Good morning. I'd like to begin by providing a summary of our second quarter results before commenting on our business prospects. We reported sales of $294 million in the second quarter of 2013. This was 3.4% above the previous year and, excluding the negative impact of foreign exchange, a 4.6% increase in constant currency. Growth was driven primarily by the RMS segment, which reported a 5.5% increase in constant currency, having benefited from the acquisitions of Accugenix and Vital River as well as growth for the Avian and legacy EMD businesses. The PCS segment also had a very strong quarter. We were very pleased with the year-over-year growth of 3.1% in constant currency as well as the sequential growth of 4.8%. As a result of our market share gains, sales to large biopharmaceutical and mid-tier clients are increasing. The consolidated operating margin declined 210 basis points year-over-year to 13% -- to 17.3% from 19.4% in the second quarter of 2012. However, it increased 50 basis points from the first quarter of this year. Both RMS and PCS contributed to the year-over-year decline. Lower legacy sales of Research Models flowed straight to the bottom line and as our global biopharmaceutical clients continue to take large facilities offline, they reduced the volume of research models that they purchased. However, as they decrease their internal capacity, these companies increase the amount of work that they outsource. This benefits our service sales in both RMS and PCS and is the primary force behind the PCS segment's return to moderate growth and the sequential margin improvement. Because we intend to maintain the RMS margin at or above 30% on an annual basis and increase the PCS margin to 15% over the next few years, we are intently focused on improving operating efficiency. As we've discussed previously, we have a number of initiatives identified through our Performance Improvement Plan [ph], which were implemented in 2012 or are currently in process. In 2013, these efforts are primarily focused on projects in the areas of procurement, energy, discretionary spending, preclinical study management and sales productivity. As we stated when we provided guidance last December, we expect all of these projects to generate approximately $20 million in annualized operating income in 2013. Earnings per diluted share were $0.73 in the second quarter of 2013 compared to $0.75 in the second quarter of 2012. We generated less operating income than in the prior year period, principally as a result of lower legacy sales of Research Models and also due to the fact that we received an insurance settlement for the tsunami in Japan in the second quarter of 2012. Sequentially, we improved operating income by approximately 4% due primarily to higher capacity utilization of our preclinical facilities and operating efficiency initiatives. And we continued to return value to shareholders in the second quarter through our share repurchase plan with the purchase of approximately 389,000 shares for $16.6 million. At its recent meeting, the Board of Directors increased the size of the repurchase authorization to $850 million. We are reiterating our constant currency sales growth guidance for 2013, which we continue to expect will be in the range between 4% and 6% with both the RMS and PCS segments in that range. Sales growth is expected to be driven by a successful targeted sales effort, which continue to enable us to gain market share, as well as the acquisitions of Accugenix and Vital River, both of which are performing ahead of plan. Our non-GAAP EPS guidance remains in a range of $2.80 to $2.90 or about 4% at the midpoint. As we discussed when we gave guidance in December, earnings growth in 2013 is being moderated by compensation costs and inflation as well as costs incurred in relation to new strategic relationships. I'd like to provide you with details on the second quarter segment results. RMS segment sales were $180.5 million or a 5.5% gain in constant currency due primarily to the acquisitions of Accugenix and Vital River. We are very pleased with both of these acquisitions, which are performing extremely well and contributing more to total sales growth than our original estimates of approximately 1% for Accugenix and slightly more than 1% for Vital River. In addition to the acquisitions, both our Avian and legacy EMD businesses contributed to sales growth but were offset primarily by continued soft sales of research models to large biopharmaceutical clients. We believe that our acquisition of Vital River was a timely acquisition to our portfolio. Demand for high-quality research models in China is expanding as researchers appreciate more and more the difference that high-quality models can make in research. With both government stimulus and academic and private investment driving pharmaceutical research, our China operation has the potential to grow significantly in the coming years. Charles River is recognized and trusted for the high-quality products and services we provide and we intend to play a leading role in this emerging opportunity. The RMS operating margin was 30%, a decline of 280 basis points from the second quarter of 2012. Last year's margin benefited by approximately 100 basis points as a result of the insurance settlement we received for Japan. Otherwise, the margin decline was primarily a function of lower legacy sales of research models, which, as I said, were affected by our global biopharmaceutical clients' buying patterns. These clients continued to reduce their purchases of research models as they rationalized capacity, which is no longer needed due to industry consolidation, elimination of therapeutic areas, rationalization of pipelines or a combination of all 3. A positive outcome for our clients' action is that they are increasing their reliance on outsourcing. As we have seen over the last 2 years, many of them have chosen to outsource larger tranches of early Discovery Services and preclinical safety assessments. Historically, discovery has been considered a core capability, which couldn't be outsourced. But as large biopharmaceutical companies have assessed the cost of maintaining in-house capabilities and we have expanded our discovery expertise, outsourcing has become a more logical choice. To maintain the RMS segment operating margin at or above the 30% level, in addition to our performance improvement initiatives we intend to rationalize some of the production capacity at our California research model facility. We will be closing 3 barrier rooms, which is equivalent to slightly less than 2% of our worldwide capacity. At the same time, we will increase production of certain isolator-bred models [ph] for which demand is increasing. These actions will enable us to enhance the products and support we provide to our clients on a more cost-effective basis. We did see a moderate impact on spending by our government and academic clients in the second quarter, which we believe may be due to sequestration. As we noted when we reported our first quarter results, one government contract was canceled and there were restrictions on filling open positions in some of our in-sourcing solutions contracts. Several of our academic clients have told us that they are concerned with the availability of funding but this has not resulted in a noticeable decline in spending to date. Therefore we are maintaining our estimate that the impact of sequestration in 2013 should be approximately $3 million. Sales of Research Models Services declined in the second quarter due primarily to the expiration of 2 long-term contracts for certain services in Europe at the end of 2012. As we'd previously noted in our first quarter results, these contracts represented approximately $5.5 million in annual revenue. The decline was offset in part by modestly higher GEMS and RADS sales as both commercial and academic researchers utilized our services in lieu of their own internal resources. In addition, sales for our in-sourcing solutions business increased slightly in the U.S. despite sequestration and significantly in Europe as clients increased the number of staff positions we were contracted to fill. Sales of Discovery Research Services, or DRS, were effectively unchanged from the second quarter of last year. The first and second quarters of 2012 were extremely strong due to the ramp in services under the strategic relationship we entered into in the fourth quarter of 2011. Sales increased significantly on a sequential basis as both our oncology and CNS franchises performed very well. Our expertise in these 2 therapeutic areas is well known and respected so, as biopharmaceutical companies increasingly choose to outsource, they are relying on Charles River for the expertise that they no longer are maintaining in-house. Given the emerging importance of outsourced Discovery Services, the area is an acquisition focus for us. Our goal is to expand our ability to support additional therapeutic areas as well as our geographic footprint. The EMD business again delivered an outstanding performance with year-over-year sales growth in excess of 20%, including the addition of Accugenix. Both our core testing products and the PTS performed exceptionally well. Primarily as a result of exposure through the larger Charles River sales force and our broader access to clients, Accugenix is reaching a bigger audience than it was able to do on its own. To support the demand for access to Accugenix's microbial identification capabilities, we are in the process of strategically expanding our testing facilities so that clients in countries other than the U.S. can have their testing performed in one of our labs situated closer to them. Our new facility in France opened in June and we have already seen significant growth there. We expect that the strong growth metrics will continue as we open laboratories in Korea in September and India in November. We intend to continue investing in both product extensions and acquisitions like Accugenix in order to drive EMD growth. We were extremely pleased with the performance of the PCS segment. Sales were $114 million, a 3.1% year-over-year increase in constant currency and 4.8% on a sequential basis. This was the highest level -- this was the highest sales level since 2010, with volumes increasing for both non-GLP and GLP services. Higher sales was a direct result of successful targeted sales strategies, which have enabled us to gain market share. These strategies highlighted our competitive differentiators: our broad portfolio of early-stage drug discovery and development products and services, which is unique in the industry; our scientific expertise; our geographic footprint; our best-in-class client data portals; our operating efficiency, which we continuously strive to improve; and our flexibility in structuring working relationships with our clients in the arrangement which is best suited to their individual needs. These differentiating factors enable us to offer clients a value proposition that few CROs can match. Furthermore, the value proposition is a compelling choice for all types of clients, as evidenced by increased PCS sales to both our large biopharmaceuticals and mid-tier biotechnology clients. Regardless of size, we build each working relationship and embed ourselves in our clients' processes, becoming an integral part of the team. We believe that one size does not fit all and that a deep understanding of our clients is essential to a successful working relationship. With approximately 25% of our total sales derived from strategic relationships, we do have improved visibility. However, the PCS operating margin exhibits some unevenness from quarter-to-quarter due to variables including volumes, study mix and pricing. The second quarter PCS operating margin declined by 90 basis points to 12.2% when compared to the second quarter of 2012 but increased 160 basis points on a sequential basis. Higher study volumes improved our capacity utilization for the quarter but a less advantageous study mix and pricing offset some of the improvement. On a year-over-year basis, the increase in sales from new strategic relationships did exert pressure on the PCS margin. This was expected because, as we have said previously, pricing for these agreements was competitive and there would also be associated start-up costs. However, we expected that as we became more integral to our clients' processes and they became more familiar with our capabilities, they would increase the amount of work they placed with us and the higher volume would improve the margin. This is occurring and start-up costs with some clients are behind us. Both factors are responsible in part for the 160-basis-point sequential margin improvement. Spot pricing remained relatively stable at approximately 1% in the second quarter. There have been certain cases in which some competitors are offering significant discounts, particularly to some of the smaller clients. In general, we have declined to match these prices. With our capacity filling, we are able to be more selective with regard to accepting lower-margin work. We have been very successful in winning new business based on our deep scientific expertise, our ability to provide clients with flexible, early-stage solutions that are unmatched by other CROs. Our global biopharmaceutical and larger mid-tier clients continue to reduce the number of providers with whom they do business in favor of a smaller, more select group of partners. Based on current discussions, we believe that this process is accelerating. We've been told by some of our clients that they are reducing some hundreds and, in some cases, thousands of suppliers to a select few. And we have also been told that Charles River is considered a first-tier supplier. This is evidenced by the fact that in most of the selection processes we have been designated as a partner or preferred provider. So our pricing remains a factor. Scientific expertise and flexibility are critical elements in a choice of an outsourcing partner. Pricing and study mix will continue to affect results but we expect that directionally, both the PCS sales and operating margin will continue to improve over the next few years. We believe this improvement will occur not only because of our focus on sales growth and operating efficiency but also because outsourcing has become essential to our clients' successful navigation of the drug discovery and development process. Discussions concerning additional strategic relationships are continuing as our clients tackle the logistics of how and what to outsource. We believe it's critical to participate in that process now. So our strategy is focused on positioning Charles River as the preferred partner for outsourced, early-stage discovery and development products and services. I've previously described the approach we are employing to achieve this strategy so I will simply remind you that our efforts include: targeted acquisitions, both upstream and geographic, which are a sound financial and strategic fit; investments to add new or upgrade some of our facilities in order to provide more capabilities and space to take on additional work; increasing collaboration across our business units in order to leverage capabilities of our unique portfolio; and improving our operating efficiency to allow us to deliver the essential products and services for which we are so well and in most cases cost-effective manner. We have worked to achieve this strategy through a series of actions over the last 5 years and believe our success is enabling us to present clients with a superior value proposition that allows them to outsource services, which they formally maintained in-house, without compromising science and with improved time frame. This value proposition is the basis of our belief that over the next few years sales growth will continue to improve, which will in turn drive operating margin expansion, earnings per share growth and free cash flow generation. Today we differentiate ourselves by our broad early-stage portfolio, which is unique in the CRO universe; our extensive scientific expertise; our attention to client service; our best-in-class data systems and portals; and our ability to structure creative, flexible solutions that support our clients' goals of reducing the cost and improving the productivity of drug development. We are dedicating ourselves to executing our strategy and continuing to return value to shareholders. In conclusion, I would like to thank our employees for their exceptional work, commitment and resilience and our shareholders for their support. Now I'd like to Tom Ackerman to give you the second quarter financial details.