Thank you very much, and good morning, everyone. Welcome to our first quarter 2013 conference call. Joining me here today is our CFO, Christa Davies. Consistent with previous quarters, I'd like to cover 3 areas before turning the call over to Christa for further financial review. And we note that there are slides available on our website for you to follow along with our commentary today. First is our performance against key metrics we communicate to shareholders; second is overall organic growth performance; and third is continued areas of strategic investment across Aon. On the first topic, our performance versus key metrics. Each quarter, we measure our performance against the 4 metrics we focus on achieving over the course of the year: grow organically, expand margins, increase earnings per share, and deliver free cash flow growth. Turning to Slide 3. In the first quarter, organic revenue growth was 2% overall, driven by strong growth in Retail Brokerage. Operating margin was essentially flat, as a significant increase in Risk Solutions margin was offset by a decline in HR Solutions and the unallocated section. EPS increased 13% to $1.11, reflecting both solid operating performance and effective capital management. And finally, free cash flow increased $80 million in our seasonally weakest quarter, driven by strong working capital performance. Overall, a solid start to the year as we strengthen our industry-leading platform for long-term growth, strong free cash flow generation and increased financial flexibility. Turning to Slide 4, on the second topic of growth. I want to spend the next few minutes discussing the quarter for both of our segments. In Risk Solutions, overall organic revenue growth was 3% compared to 4% in the prior year quarter, with growth across every major business. As we've discussed previously, we're driving a set of initiatives that are strengthening underlying performance and positioning our Risk Solutions segment for long-term growth and improved operating leverage with management of our renewal book through Client Promise and retention rates more than 90% on average, our record level of performance, highlighting strong client satisfaction in Retail Brokerage; new business generation of approximately $240 million across our Retail business, with double-digit new business growth in many markets globally across the Americas, Asia and Pacific regions; investments in new product and service capabilities, with the rollout of GRIP and Aon Broking globally; and in our core treaty reinsurance business, net new business trends have now been positive for 8 consecutive quarters. Reflecting on the individual businesses within Risk Solutions. In the Americas, organic revenue growth was 6% compared to 4% in the prior year quarter. Exposures are relatively stable, and the impact from pricing was modestly positive on average, reflecting a steady pace of change over the last 12 months. We saw solid growth across all regions, including Latin America, U.S. Retail and Canada. In U.S. Retail, we delivered solid growth, driven by double-digit new business growth, including growth in property/casualty, health and benefits, construction and Affinity, as well as strong management of the renewal book portfolio with improved retention and rollover rates. In international, organic revenue growth increased 3% compared to 4% in the prior year quarter. Exposures are relatively stable, and the impact from pricing was flat on average, with firmer pricing in cat-exposed regions and softer pricing in most regions across Europe. We saw strong growth in emerging markets, New Zealand and many markets across Asia, including double-digit growth in areas such as Korea, Philippines and Singapore. In the U.K. and continental Europe, macroeconomic conditions remained fragile across many core markets. However, with leadership positions across this region, we saw strong retention rates, and management of our renewal book portfolio delivered modest growth. Overall, a solid performance against economic and market headwinds. In Reinsurance, organic revenue growth was 1% compared to 5% in the prior year quarter. As we noted last quarter, record capacity continues to be available to meet demand, and cedents are retaining more risk, driving an unfavorable market impact in the quarter. Results reflect growth in our capital markets advisory and transaction business, as well as facultative placements. In treaty, as mentioned before, net new business won was positive for the eighth consecutive quarter. Overall, this level of performance and strength in new business generation reflects Aon Benfield's value proposition for clients, while strengthening operational performance and reducing volatility through unmatched data, analytics and advisory capability. Finally, we would observe that absent an event in the industry, macro factors will continue to be a headwind in 2013. Turning to HR Solutions. Overall, organic revenue growth was 1% compared to 3% in the prior year quarter. We saw modest organic growth across both Consulting and Outsourcing despite weak discretionary spend globally and continued economic pressure in continental Europe. Underlying performance also reflects growth in areas where we're making significant investments in the business, in areas such as healthcare exchanges, investment consulting, pension and risk management consulting and HR BPO. These investments reflect Aon Hewitt's client leadership, understanding of market trends and the long-term issues that face our clients as healthcare reform, healthcare costs and the associated financial risk continue to rise unchecked at a time when overall health and wellness is not improving. Multinational clients are increasingly looking for a global benefit solution that supports their global organizations delivered at the local level, managing and transferring risk across pension schemes that are increasingly frozen and largely underfunded. And finally, after continuing to work through the worst economic recession in the last 70 years, clients are just beginning to renew their focus on talent, retention, development and engagement to prepare themselves for renewed long-term growth. Turning to the individual businesses within HR Solutions. In Consulting Services, organic revenue growth was 1% compared to 1% in the prior year quarter. Underlying results reflect growth in communications consulting and strong demand across our retirement businesses, for investment consulting, pension administration services and talent rewards. And despite continued pressure on discretionary services and overall economic weakness in continental Europe, for the full year, we continue to expect low- to mid-single-digit organic growth across the Consulting Services business. In Outsourcing, organic revenue growth was 1% compared to 3% in the prior year quarter. Organic growth reflects net new client wins and demand for HR BPO, healthcare exchanges and discretionary services, partially offset by a modest decline in benefits administration. As we noted last quarter, we continue to make progress in our healthcare exchanges, and the pipeline for growth during the fourth quarter of 2013 enrollment period continues to grow. If you think about the corporate exchange, the progress of the team has been a truly outstanding accomplishment, from concept in 2011 to launch last quarter of the industry's only active corporate exchange; enrollment of roughly 100,000 employees plus eligible dependents; and all participating clients are referenceable, with representation for both existing and new clients on the exchange. Great progress from the team in healthcare exchange area, reflecting the strength of our industry-leading platform across employee benefits design, brokerage and administration. Slide 5 highlights the third topic, areas of investment. We believe Aon is in a unique position. Solid long-term operating performance, combined with expense discipline and strong free cash flow, continues to enable substantial investment in colleagues and capabilities around the globe. A few examples include, in Risk Solutions, we're investing in client leadership to drive greater productivity and efficiency, with the rollout of the Revenue Engine internationally, as well as the rollout of Client Promise, which is driving greater retention and rollover rates. We continue to invest in innovative technology such as the Global Risk Insight Platform. GRIP is the world's leading global database of risk and insurance placement information. We now have roughly 1.6 million trades, more than $83 billion of bound premium and a growing client list of insurance carriers utilizing the platform for its analytics and service capabilities. In addition, we're driving our Aon Broking initiative to better match client needs with insurer appetite for risk, as highlighted by our ability to package similar risks and place substantial programs and facilities into the market on behalf of clients. A great example of this is a sidecar facility agreement we announced with Berkshire Hathaway, providing clients efficient access to AA+-rated capacity for eligible business placed by Aon Risk Solutions. Clients are expressing considerable interest in this facility, especially in traditionally capacity-challenged sectors, as a way to augment capacity for products within those sectors. We're also investing in continued alignment of our global Health and Benefits platform to better capitalize on our global distribution channel and deep brokerage capabilities. And we continue substantial investment in further development of data and analytics capabilities at Aon Benfield to strengthen already industry-leading client servicing capability. And finally, we're expanding our footprint through tuck-in acquisitions that either increase scale in emerging markets or expand capacity to better serve clients, as well as adding key talent across Asia in specialty sectors and in our GRIP solutions business. In HR Solutions, we're making significant investments to strengthen our industry-leading position in healthcare exchanges, both in retiree and active markets. Healthcare exchanges enable clients to begin the shift of their participants to a market-based, defined contribution model for healthcare while addressing unsustainable healthcare cost increases and decreasing population health. While already a growing leader in the retiree market, we launched the industry's first and only fully insured, multi-carrier corporate exchange in Q4 and will be focused on driving greater scale in 2013 and improved returns in 2014. We're also expanding in high-growth areas for both current clients and new markets. Innovative solutions to de-risk pension plans are in high demand with our existing retirement client base. And our delegated pension solutions are opening relationships in new markets. We continue to expand our industry-leading benefits administration solutions and technology platforms, including extensive mobile solutions. And finally, we're strengthening our international footprint to support a global workforce with investments in key talent capabilities across Asia and emerging markets. Overall, we've proved the concept for these major investments in 2012, and we're on plan to drive greater scale and increased operating leverage in 2013. In summary, we delivered organic revenue growth across both Risk and HR Solutions, continued to ramp up significant strategic investments that will drive greater long-term growth and operating leverage, delivered double-digit earnings and strong free cash flow growth. With that said, I'm now pleased to turn the call over to Christa for further financial review. Christa?