Thank you, Don. The topics I will cover today include a discussion of our second-quarter financial results, an update on the Arizona economy, and a review of our financial outlook. Slide 3 summarizes our GAAP net income and ongoing earnings. For the second quarter of 2015, we reported consolidated ongoing earnings of $123 million, or $1.10 per share, compared with ongoing earnings of $132 million, or $1.19 per share for the second quarter of 2014. Slide 4 outlines the variances in our quarterly ongoing earnings per share. I'll highlight a few of the more significant drivers. Lower gross margin decreased earnings by $0.02 per share. I'll cover the drivers of our gross margin variance on the next slide. Higher depreciation and amortization expenses decreased earnings by $0.07 per share. Similar to the first quarter, this variance includes the absence of the 2014 Four Corners cost deferrals and related 2015 amortization of the deferrals and costs associated with the acquisition price. G&A expenses were also higher due to additional plant in service. Lower interest expense, net of AFUDC, benefited earnings by $0.04 per share. The decrease largely reflects reduced interest charges resulting from refinancing long-term debt at a lower rate. There is not an operations and maintenance expense variance on this slide, since it is flat year-over-year, as higher generation expenses, primarily due to the effects of planned maintenance, were offset by lower employee benefit costs. Turning to Slide 5, I'll cover a few of the key components of net decrease of $0.02 in our gross margin. Weather-normalized retail kilowatt hour sales, after the effects of energy efficiency, customer conservation, and distributed generation increased 0.3% in the second quarter of 2015 versus 2014, although the earnings impact was immaterial. Collectively, the adjuster mechanisms continued to add incremental growth to our gross margin as designed, contributing $0.10 per share primarily to the Four Corners adjuster that went into effect on January 1. Offsetting Four Corners expenses are included in the other drivers, primarily D&A, which I mentioned earlier. The effect of weather variations decreased earnings by $0.06 per share. This year's second quarter was milder or less favorable than normal, while the second quarter of 2014 was warmer, or more favorable compared to normal conditions. In total for the quarter, cooling degree days on an 80-degree base were on par with normal conditions, but this one statistic does not do justice to the variance in daily weather we experienced throughout the quarter. In particular, the entire month of May and the first half of June were quite mild, followed by a snap to high temperatures in the second half of June. While we saw usage behavior very much in line with expectations, once the hot weather arrived in mid-June, prior to that period, weather-sensitive usage remained well below where our models would have predicted, an indication that our customers took advantage of the mild conditions to essentially not use much air conditioning at all. With 21 days in May below 95 degrees for the high temperature, and most overnight lows in the low 70s or 60s, the typical heat buildup we would expect to see did not materialize, and allowed customers to ignore a handful of warm days that did occur during the month. The net effect of lower transmission revenues decreased quarterly results by $0.04, driven by a formula rate true-up in the second quarter of this year, included in our annual filing in May. We anticipate transmission revenues will be a positive driver for the full year. As a reminder, both the O&M and gross margin variances exclude expenses related to the renewable energy standard. Energy efficiency and similar regulatory programs, all of which are offset by comparable revenue amounts under adjustment mechanisms. Also, the impacts of our non-controlling interest for the Palo Verde lease extensions are treated in a similar manner. The drivers I discussed exclude these items, so there was no net impact on second-quarter results. Slide 6 presents a look at the Arizona economy, and our fundamental growth outlook. Arizona's economy continues to grow, much like it has in the past several quarters. Job growth in the second quarter in Arizona in the Phoenix Metro area remain data were above the national average, as they have for 14 of the last 16 quarters. As seen in the lower right-hand side of slide 6, Arizona added jobs at a 2.2% year-over-year rate. For the first six months of 2015, Arizona has added jobs at the fastest rate since the first half of 2007. As I've mentioned before, business services, healthcare, tourism, and consumer services are the sectors with the strongest job growth. Each of these sectors is adding jobs at a rate of between 3% and 7% over the prior year, and is helping to fuel continued demand for office and retail space in metro Phoenix and elsewhere. Absorption of vacant office space in Metro Phoenix has averaged between two million and three million square feet per year since 2011, and similarly, absorption of vacant retail space has run at about two million square feet per year. As seen in the upper right-hand side of Slide 6, vacancy rates in these sectors continue to work their way down from their highs in 2010, and new investment activity in these sectors has picked up. Almost four million square feet of office space is currently under construction, virtually all of which is scheduled to come online in late 2015 or 2016. A multi-building development by State Farm Insurance at Tempe Town Lake accounts for half of this activity. At only half a million square feet, retail construction can be considered soft at the moment, but with the vacancy rate below 8% in several sub-regions within the metro area and strengthening single-family home market, we expect retail construction to accelerate in the coming quarters. Finally, as I have described before, the industrial building sector remains a source of strength for the Valley. Over the last couple of years, the amount of new industrial space added to the market has ranged from four million to eight million square feet per year, all of which has been absorbed. At 11%, the industrial vacancy rate is at its lowest level since the beginning of 2008. Only two million square feet of industrial space is under construction currently, so we fully expect industrial vacancies to continue to decline and motivate additional construction in the coming quarters. Turning to the residential sector, metro Phoenix housing permits were relatively flat for the first six months of 2015 on a year-over-year basis. However, there were some sizable shift between the single-family and multi-family sectors. Single-family sales and permit activity were up about 35% over the prior year, while new development in the apartment sector slowed considerably. Our expectation for year-end housing market permit activity can be seen in the panel at lower left. The dynamics we are seeing in the residential housing market today are influenced by incredibly tight vacancy levels in apartments, rapidly increasing apartment role rates, continued low interest rates maintaining a higher level of single-family home affordability, and the expiration of the mortgage blackout period for the first substantial wave of foreclosed homeowners. Back in 2008, 37,000 homeowners lost their homes to foreclosure in metro Phoenix alone. In 2009, 43,000 homes were foreclosed upon. After seven years, these families will now have much more accessibility to owning a home while homes remain quite affordable. In addition to the favorable trends in job growth and the prospects for new construction, Arizona consumers are also participating in the recovery. Real consumer spending on retail and restaurant and bar sales increased by 10% in the second quarter, the best rate in 10 years. Purchases were led by home and garden sector, and new auto sales. Steady income growth, improving consumer confidence, and lower gas prices are all contributors to this most recent surge. In summary, we can see continued healthy job growth, especially in certain sectors, providing the momentum for absorption of commercial space in vacant housing, which in turn is providing for an environment of increased investment and new development. As I have mentioned before, Arizona and metro Phoenix remain attractive places to live and do business, especially as it is positioned relative to the high-cost California market. We expect 2015 to be better than 2014 in terms of job growth, income growth, consumer spending, and new construction. Reflecting the steady improvement in economic conditions, APS's retail customer base grew 1.2% compared with the second quarter last year. We expect that this growth rate will gradually accelerate in response to the economic growth trends I just discussed. Importantly, the long-term fundamentals supporting future population, job growth and economic development in Arizona appear to be in place. Slide 7 outlines our financing activities. Our balance sheet continues to be one of the strongest in the industry. We are now rated A-minus or better at all three rating agencies. In May, Fitch announced its upgrade to APS's senior unsecured rating to A from A-minus, as well as similar upgrades to Pinnacle West and APS's corporate credit rating. Additionally in June, Moody's upgraded APS's senior unsecured and corporate ratings to A2 and Pinnacle West's corporate credit rating to A3. In connection with these rating actions, the rating agencies cited the Company's strong financial and credit profile, as well as increasingly constructive and supportive regulatory environment in Arizona. In terms of our recent financings, on May 19 APS, issued $300 million of 10-year, 3.15% senior unsecured notes. The proceeds from this sale were used to refinance the $300 million 4.65% May maturity. Also in May, APS purchased all $32 million of the Maricopa County 2009 Series B Pollution Control Bonds which we may later remarket. Overall, liquidity remains very strong. At the end of the second quarter, the parent Company had no short-term debt outstanding, and APS had $158 million of commercial paper outstanding. Finally, I will review our earnings guidance and financial outlook. We continued to expect Pinnacle West's consolidated ongoing earnings for 2015 will be in the range of $3.75 to $3.95 per share. A complete list of factors and assumptions underlying our guidance is included on Slide 8. The adjuster mechanisms and cost management remain important drivers, particularly in the second half of the year. We have maintained our earnings per share guidance but adjusted certain line items, primarily due to what we have realized year-to-date for gross margin and interest savings, while moving planned coal unit outage from 2015 into 2016. Our guidance assumes normal weather. Our rate base growth outlook remains 6% to 7% through 2018, and we continue to forecast that we will not need additional equity until 2017, at the earliest. This concludes our prepared remarks. Operator, we'll now take questions.