Thank you, Barbara. Good morning, everybody. Before Martina gets into the details of our results, let me start, as usual, with some high-level comments. In the fourth quarter, we saw net revenue growth of 20% as reported or 21% on a constant-currency basis. And that helped to fuel operating income growth of 34%, excluding the special item for the litigation charge. And as you see on Slide 2, this quarter's performance capped off a very strong 2011 for us, with net revenue and EPS growth ahead of our 3-year objectives. We had a strong operational performance with annual gross dollar volume, cross-border volume and processed-transaction growth rate in the mid- to high teens, all driven by very solid local execution. And we delivered an operating margin a bit ahead of our 50% minimum target, while actually finding a way to continue to invest in strategic initiatives for the long-term growth of our business. We have some decent economic news in the United States lately with the unemployment rate dropping to 8.5%, consumer confidence increasing over the past few months to an 8-month high. This comes as consumer balance sheets have improved, following a period of deleveraging. And all of this has had a positive impact on consumer spending, as is reflected in our SpendingPulse data, which showed growth in December for all the 11 retail sectors that we track. Now we saw continued strength in our own U.S. volumes, which were up about 12% for the fourth quarter. But this positive news remains tempered by the uncertainty that persists in the picture of the unemployment rate and housing prices. And you should also remember that U.S. retail sales, as well as our own U.S. volumes, begin to hit tougher year-over-year comparisons -- actually, that started late in 2011, and it'll persist through the year 2012. In Europe, our business remains strong in spite of another quarter of negative headlines regarding the macro situation there. Fourth quarter volumes grew almost 17%, in line with the growth we saw with the prior 2 quarters, driven by double-digit cross-border volume growth. The addition of domestic processing in The Netherlands continues to drive significant processed-transaction growth in the region. You should remember that our European region is comprised of nearly 60 markets, extending far beyond Western Europe and the Eurozone. In fact, the majority of our revenue comes from the relatively stronger economies of Northern and Eastern Europe, where we continue to see strong growth in both processed volume as well as revenue, with particular strength in France and Germany and The Netherlands. The countries most often talked about as troubled, Portugal, Italy, Ireland, Greece, Spain account for less than 5% of our 2011 global net revenue. In January, processed volume growth in these countries, these so-called troubled countries has decelerated only slightly from the mid-teens level that we saw over the previous several months. That said, in the Eurozone, we have seen a decline in consumer sentiment in the third and fourth quarters of 2011. In the past, it has taken a few quarters before changing consumer sentiment impacts the growth of PCE in this region. And as such, we've continued to watch our European business closely. And of course, there is the potential that Europe's impact could spread to the U.S. and other regions. That's what we read about in the papers every day, but the facts are that as it relates to Latin America and the Asia-Pacific, Middle East, Africa we finished 2011 with GDV growth greater than 20% in the fourth quarter in those 2 regions as well, with strength in both domestic and cross-border volumes. With all of that as a backdrop, the facts are the lingering uncertainty in Europe and the lukewarm recovery in the U.S. is what makes us continue to have a cautious outlook for overall consumption growth of PCE. We remain focused in what we can influence: the steady displacement of cash and our ability to gain share in the electronic payment space, both of which, we've continued to make progress on. So before I get to some business highlights, I thought I'd give you a quick update on the litigation front. And as you see in this morning's earnings release, we took a $495 million after-tax charge in the fourth quarter. This charge is an estimate of our financial liability that could result from a settlement of U.S. merchant litigations and is basically based on the progress in the mediation process. We know there's been a good deal of speculation in the marketplace about the terms of this settlement -- of this potential settlement. The mediation discussions remain confidential, so I can't really say much beyond what's in our release. But being that much of the speculation is about credit interchange, I want to make clear that we would not agree to any significant or long-term reductions in MasterCard's credit interchange rates as part of any settlement. In the meanwhile, we continue to execute our strategy displacing cash, winning deals to get more than our fare share of payments growth. And let me share a few business highlights. During this quarter, we signed a number of really interesting partnerships connected to our strategic priorities: First, our global agreement with Western Union to help us grow and diversify while displacing cash and serving some of the world's 2.5 billion financially underserved people. In addition to becoming Western Union's preferred prepaid brand globally, we are working to enable all 485,000 agent locations of Western Union to serve as reload locations for any MasterCard Prepaid Card. Western Union and MasterCard are also working together using our MoneySend platform and issuer relationships to help remove cash from either side of the remittance transaction. Last year, we entered into a JV with Telefónica, covering the 12 Spanish-speaking markets in Latin America where Telefónica operates the Mobistar brand, with 87 million customers. In November, we signed an additional JV agreement with Telefónica, this one in Brazil. The Telefónica's brand is called is called Vivo, and it reaches an additional 65 million customers. With that, we now have completed our relationship across the breadth of Telefonica's geographic footprint in Latin America. Both these JVs are focused on providing consumers with mobile payment services, to drive financial inclusion, increase acceptance of the users of payments over the next few years. We also entered into a strategic relationship with Intel to leverage Intel's ultra-book chip, what some of you may have seen at this year's Consumer Electronics Show. When a consumer reaches checkout on an e-commerce site, all they will need to do is tap their PayPass-enabled device from their computer, which will do a few things. For consumers, it'll speed up and simplify the checkout process while making the transaction more secure, because it leverages dynamic authentication, something most PayPass transactions do. And for merchants, while this security will help to reduce fraud, we believe this will also help to reduce shopping cart abandonment, making it much more productive for them. We've also signed a commercial agreement with mFoundry, as well as having taken a small equity stake in that company. mFoundry develops mobile banking apps for nearly 600 banks and credit unions in the U.S. This should give us a chance to give the U.S. consumers of these institutions -- of these 600 institutions, mobile PayPass capabilities integrated with their online banking apps. On to the U.S. in specific, the team continues with solid execution across the lines of business in debit. Banks are continuing to work through their decisions to comply with debit non-exclusivity. At this point I can tell you, we have won PIN deal with a couple of major U.S. banks and have already begun to see some of those transactions. We've signed an agreement with KeyBanc as well to add PIN debit and to move on to our IPS platform. We've also renewed our signature debit and ATM relationships with them. During the quarter, we converted the conversion of Huntington to MasterCard debit card and onto our IPS platform. And interestingly, while the top 25 banks in the U.S. do get spoken of most often, we all know that independent banks and credit unions are important players. Credit unions alone serve over 90 million U.S. consumers. In 2011, we made substantial in-roads here. We've signed debit and credit deals with almost 150 of these issuers. And importantly, a good proportion of these deals were conversions from competition. We've also won some new U.S. public sector prepaid programs, which should be launching shortly. The State of California will issue prepaid MasterCard for child support payments. New York State, Oklahoma will leverage prepaid MasterCards as an option to distribute income tax refunds. Dollar General now accepts MasterCard credit cards and will distribute MasterCard Prepaid Cards in its 10,000 stores, all of which will also become prepaid reload locations like those Western Union agents I was telling you about. And just this week, we contracted with Toys"R"Us to be the exclusive network partner for their co-brand program. So on the topic of merchants, we're bringing all of our assets to bear to drive value for merchants in a variety of ways. Let me give you some flavor. Two major automotive brands will begin accepting MasterCard debit cards in the U.S. for monthly lease payments. In France, Casino, a top 5 mass retailer will convert its private label store card to a co-branded MasterCard PayPass card. PayPass acceptance new across geographies, some examples: taxis in Hong Kong; pharmacies and gas stations in Russia; discount grocers in Austria; Canada's largest pharmacy; in the U.S., RadioShack, Gap stores in San Francisco, Pinkberry and so on. With our Priceless Cities program now in New York, in London and Toronto, we partnered with restaurants, retailers, theaters and other merchants to drive traffic and offer cardholders priceless experiences they would otherwise not be able to get. In Europe, we are partnering with affluent merchants to bring global travel benefit, VIP guest passes, accelerated bonus points to MasterCard World Elite and Black cardholders. The luxury brands we are working with include, for example, Mandarin Oriental, Fairmont hotels, Oxford Jet and more are getting signed up. In the other regions, we are continuing to work on paving the way for the growth of electronic payments. In Africa, a growth region that MasterCard has traditionally been relatively underrepresented in, we have signed a bunch of things. During the quarter, we signed an MOU with Ecobank Group to drive the issuance and acceptance of prepaid and debit accounts across 31 African markets, where Ecobank has more than 750 branches and offices. In Nigeria, we signed an agreement with Zenith Bank, one of the largest banks in Western Africa, as well as a debit deal with Skye Bank. We've continued to launch debit cards with other customers as well, programs with GTB Bank in Ghana, NBC in Tanzania, as well as a major global bank with a presence in Kenya to issue world debit cards. Also in Kenya, we've launched prepaid MasterCards aimed at young travelers with Equatorial Commercial Bank. In South Africa, we've launched PayPass cards in virtual card numbers, as well as prepaid cards for insurance, and interestingly, micro-finance distribution. Now we've even got an office in Nairobi to serve as a hub for our East African business. In Russia, we're working with MTS, the largest mobile network operator in that market, and we're developing mobile PayPass products for their consumers. They're pushing ahead of mobile payments in China. We just signed an MOU with Unicom for e-pay to explore collaboration. And while on China, China Industrial Bank launched a Geneo [ph] airlines co-brand MasterCard, which adds the co-brand relationships we already have with the top 4 airlines in China. In the commercial space, we've launched numerous programs in China, including 5 new co-branded commercial card products with China Construction Bank, which by the way is also launching a frequent business airline travel card. And talking of airline cards, Air New Zealand Airpoints customers will now get a card that comprises a monthly currency PayPass-enabled MasterCard Prepaid Card on one side, with their Airpoints membership card on the other side. And you can actually tap the card to check into your flight. So that's just the flavor. Tons of these going on. Now let me turn the call over to Martina for a detailed update on our financial results and operational metrics. Martina.