Good morning, everyone, and welcome to our first quarter conference call. Joining me today is our CFO, Christa Davies. To begin, our first quarter results reflect continued momentum and progress as we execute on our strategy to distinctly strengthen and unite Aon around the globe, irrespective of the stock market, economic conditions or other challenges outside our control. Consistent with previous quarters, I'd like to cover 3 areas before turning the call over to Christa for further financial review: First is our performance against key metrics we communicate to shareholders; second is continued areas of investment across Aon; and third is overall organic growth performance. On the first topic, our performance versus key metrics. Each quarter, we measure our performance against the 3 metrics we focus on achieving over the course of the year: grow organically, expand margins and increase earnings per share. In the first quarter, organic revenue was plus 2%, highlighted by solid growth in both our Retail Brokerage and Consulting Services businesses, placing us firmly on track for growth in 2011. Adjusted operating margin decreased 230 basis points and EPS was $0.80 as the inclusion of Hewitt results, including a significant increase in intangible amortization expense and a higher effective tax rate, offset strong underlying performance and effective capital management. Overall, our team views the underlying first quarter results as a solid quarter of continued progress, as we strengthen the firm for long-term growth and value creation. On the second topic, further areas of investment. We believe Aon is in a unique position. Solid operating performance combined with expense discipline and strong cash flow continues to enable substantial investment in colleagues and capabilities. As we have significant opportunity remaining to deliver further margin expansion, we will continue to build on our leadership position and industry-leading capabilities to capture growth opportunities we see across our markets, specifically focused on the 2 most dynamic sectors of the global economy, risk and people. A few examples include, in Risk Solutions, we're investing in innovative technology, such as our Global Risk Insight Platform and Impact On Demand to ensure that clients have full access to the best of global Aon in every region around the globe. In fact, highlighting the unique value of GRIP, we've now completed over 1 million trades, capturing more than $50 billion of premium and continue to expand its addressable market opportunity. We're also investing additional capability in talent, as well as strengthening our international footprint through recent and continued acquisitions such as Glenrand in South Africa, which solidifies our position as the largest broker on the continent of Africa. We're investing in client leadership to drive greater productivity and efficiency with the rollout of the revenue engine in EMEA and Asia Pacific; the rollout of Client Promise, which is driving greater retention rates and ensuring clients understand our value proposition; and the rollout of our Aon Broking platform, to better match client needs with insurer appetite for risk in any geography around the globe. In HR Solutions, we continue to strengthen our industry-leading position in both public and corporate healthcare exchanges, enabling clients to prepare for ultimate changes in healthcare legislation with design, purchasing, administrative capability. We're expanding our capability in investment management consulting as highlighted by the acquisition of EnnisKnupp. This complements our incredibly strong U.K. business, creating an industry leader with over $4.3 trillion in assets under advisement. We're expanding our international footprint as the workforce is increasingly becoming more global with investments in key talent and capabilities across Asia. And finally, we're continuing to invest in expanding our core HR BPO offering and platforms, including the use of new social media channels. In addition to our focus on our core BPO business, we're also continuing to expand add-on benefits in HR Solutions that have shown significant growth in the last 2 years. In summary, across Risk Solutions and HR Solutions, our fundamental client-serving capability continues to substantially strengthen around the globe. These investments, fully funded in the context of long-term margin improvement, position Aon very well to take advantage of an improving global economy and a long-term growth opportunity we see across our markets. Finally, on the third topic of growth. I want to spend the next few minutes discussing the quarter for both our segments. In Risk Solutions, overall organic revenue was plus 2%, a continuation of the positives trend we saw in the prior quarter and a solid start to the year, despite soft pricing, excess capital and fragile economic conditions globally. Against these headwinds, which were primarily market-related, we're driving a set of initiatives that continue to strengthen our underlying performance and give us confidence that our Risk Solutions business is firmly positioned for long-term growth and leveraged in an improving economy. We have strong management of our renewable book portfolios with Client Promise and retention rates of 90% or better on average, highlighting strong client satisfaction. Strong new business generation of more than $200 million across our Retail business with double-digit new business growth across many markets including France, Italy, Asia, Africa, New Zealand and Canada, just to name a few, highlighting the strength of our global client-serving capability. Investments in new product and service capabilities with the rollout of GRIP, Client Promise and Impact on Demand. Turning to the individual businesses. In the Americas, organic growth was plus 4%. We saw a strong growth in Latin America and in our Affinity products, modest growth in U.S. Retail despite continued pressure from pricing which is down low single-digits on average and a weakness in major sectors such as construction. On the international front, organic revenue growth was plus 3%. We saw a strong growth across Asia and New Zealand, driven by a solid client retention and new business activity. We have modest growth in the U.K. Retail side and EMEA as exposures are generally stable. We're recognizing the economic conditions remain fragile across the region. In Reinsurance, organic revenue was flat. Results reflect a modest improvement from a minus 1% in the prior quarter. Growth in facultative placements were offset primarily by higher CD retentions, continued soft pricing in the U.S. for treaty placements. And despite significant industry losses in international in the first quarter, we believe excess capacity globally will continue to drive soft pricing globally, albeit, at a moderately lesser rate of decline. Given these industry conditions for Treaty business and the transactional orientation nature of the facultative placements and capital advisory, we'd expect the trends on our Reinsurance business to be fairly similar for the foreseeable future. Turning to HR Solutions. Overall, organic revenue was flat, similar to the prior quarter as price compression in Benefits Admin continued and fragile economic conditions placed pressure on corporate discretionary spend and global unemployment trends. Against these headwinds, which are primarily market-related, we're driving a set of initiatives that continues to strengthen our underlying performance and gives us confidence that our HR Solutions business is firmly positioned for long-term growth and leverage in an improving economy, with a high degree of recurring revenue across HR Solutions, with strong renewal rates highlighting strong client satisfaction. Solid business generation of over 100 new client wins including more than 10 new large and mid-market Benefits Admin wins and a very significant win with a large leading financial institution in HR BPO. And continued investments in new product and service capabilities in emerging markets such as investment management consulting, healthcare exchanges and international markets. Turning to the individual businesses on the HR Solutions side. In Consulting Services, organic revenue increased 4%. The results reflect the modest improvements in the prior quarter. Solid growth in international health and benefits and human capital consulting was partially offset by the impact of weaker economic conditions in the U.S. retirement consulting. In Outsourcing, organic revenue decreased 3%. Anticipated price depression and a modest decline in project-related revenue in Benefits Administration was partially offset by new client wins and growth in point solutions revenue and the HR Business Process Outsourcing business. Excluding the $14 million favorable impact relating to deferred revenue by Hewitt in the prior quarter, organic revenue Outsourcing would have been flat compared to the prior year quarter. Most important, I wanted to provide a brief update on the progress of Aon Hewitt. First, our teams are working exceptionally well together to support clients and client disruption has been basically nonexistent. As an example, 8 new Benefits Administration clients went live on January 1, and 2 large HR BPO clients are ramping up with all systems go, and implementation proceeding exceptionally well. The leadership team is being particularly sensitive to all the normal issues that arise out there and they're listening very carefully and working hard to respond to feedback from our colleagues around the world. And we're deeply engaged with key talent across the businesses to ensure we're building a solid foundation for long-term growth. Second, new business wins across Aon Hewitt continue to be exceptional across middle market, large corporate and Fortune 100 clients, with Aon Hewitt having already secured a number of new business wins across multiple product lines, as clients fully recognize the breadth and depth of Aon Hewitt's products and services capability. Lastly, the integration activities are largely complete. We are fully on track to deliver the $355 million of synergy savings in 2013, as well as our committed savings in 2011. And Christa will provide an update on this shortly. With the integration work set, we're focused on growing and building Aon Hewitt for the future. It's a very exciting time for all of our team. In summary of our first quarter results, we're delivering solid underlying progress against the key metrics we communicate to shareholders. Events occurring in Japan, Australia, New Zealand, our pending healthcare reform in the U.S, just to name a few, only reinforce the needs of our clients and the significant long-term growth opportunities for Aon as the industry leader in both Risk and HR Solutions. I'm now pleased to turn the call over to Christa for further financial review.