Thank you, Mark and good morning to everyone. We appreciate your interest in Vulcan Materials and hope that you and your families continue to be safe and healthy. I want to begin by saying that our performance in the first quarter was a very promising start to the year. Demand in our markets continues to improve and our team executed well as evidenced by our financial results. Adjusted EBITDA, which excludes the gain on sale from our reclaimed quarry in California, was $244 million, up 22% compared to last year. This strong growth was driven in part by a 3% increase in aggregate shipments. Despite weather impacts across Texas and parts of the Southeast in February, we experienced a pickup in shipments and March proved to be a strong month. Residential starts continue to accelerate and highway starts also increased due to improved lettings in the third and fourth quarters of last year. We've experienced an increase in both the number of jobs and the shipping speed in the heavy nonresidential space which is also the most aggregate intensive. And finally, some of the jobs that had been postponed last year have started. With year-over-year improvement across our footprint pricing was the second driver of our EBITDA growth. Freight-adjusted aggregates pricing increased by 2% in the quarter. Adjusted for mix, the increase was 1.3%. This was as expected since we were shipping work that have been bid in the middle of the pandemic when there was uncertainty and a lack of demand visibility. As our 2021 price increases gain traction, we will see pricing improvement throughout the year. The third driver of EBITDA growth and the one most within our control was our exceptional cost performance in the quarter. Aggregate total cost of sales per ton was 2% lower than last year's first quarter. And cash cost of sales per ton declined by 3%. Cost control like this is an accomplishment and requires considerable discipline from our operators. The team focused hard on operational execution. And as a result, all of our operating parameters in the quarries improved year-over-year. We were pleased with the meaningful impact from our four strategic disciplines, which will continue to mature. The most compelling metric, continues to be our strong unit margin gains across the footprint. Aggregates, cash gross profit per ton, increased by 9%. This demonstrates the attractive operational earnings power of our aggregates business, when demand is combined with strong execution on our four strategic disciplines. Overall, our operating results this quarter, helped drive a 90 basis point improvement in our return on invested capital. Suzanne will provide further comments on this and other aspects of our financial performance. Let's now turn to our view of the end markets and then we'll cover how, that influence our outlook for the full year. Broadly speaking, the demand environment improved considerably over the last few months. Construction starts, as measured by Dodge, got better along with other leading indicators, like the Dodge Momentum Index and ABI. Construction employment levels continue to improve as well. Residential construction remains the strongest end market. There is pent-up demand for houses and new subdivisions are being built with more to come. The market fundamentals of low interest rates and reduced supply are still in place, which foreshadows continued growth. Housing starts are growing faster in Vulcan-served markets. The outlook for our nonresidential end markets remains limited. However, our quote activity has increased and leading indicators are improving, which suggest that a turnaround is happening. The strongest nonresidential sector relates to e-commerce and technology and encompasses data centers, warehouses and distribution facilities. According to Dodge, 90% of the growth in this sector will occur in Vulcan-served markets. Majority of non-res starts currently fits within this category, but we believe, a strong residential market combined with an increasingly open economy will drive additional demand in other nonresidential sectors. With respect to highways, state budgets and lettings are progressing as anticipated. We are seeing the improvement in lettings from the second half of 2020, now turning to shipments. The COVID-19 relief funds have provided a backstop for any loss transportation revenues for highways. Our country's leadership continues to work on an infrastructure package. Both parties have proposed substantial increases in highway funding and this is a priority for both the Democrats and the Republicans. To summarize, our view of end markets, demand is improving. We see evidence of this both on the ground with our customers and in the data from leading indicators. As a result, we've upgraded our aggregates volume guidance for 2021 to a range of 1% to 4% growth compared to 2020. Excluding the gain on the sale of the California property, we now expect full year adjusted EBITDA of between $1.38 billion and $1.46 billion. As we look forward to consider opportunities, we have three paths to growth, with higher returns. Those paths are organic growth, M&A and greenfields. I'll take each in turn. First, organic growth is a critical part of any strategy, because it offers the most attractive and compelling value proposition on a risk-adjusted basis. We have the best geographic footprint in the industry and the best operators in the industry but we are not satisfied. Our four strategic disciplines are designed to accelerate this organic growth strategy. And the benefits are clear as we grow our unit profitability. Second, we regularly review an active list of M&A targets. Last year the M&A market basically shut down. But it's reopened this year. We have a long history of making both large and small acquisitions when they are a good strategic fit. Since 2014, we've completed more than two dozen value-enhancing acquisitions in some of the fastest-growing markets in the country. And finally, we had a long and successful history of developing and opening new aggregate locations. This allows us to pinpoint the location of aggregates reserves in growth quarters where there is no acquisition opportunity. Additional benefits include more control over timing of capital investment and not paying a premium for the assets. We like having a balance between organic and inorganic growth. It provides a high degree of flexibility and is an important part of our capital allocation process and our ability to increase our return on invested capital. I'll now turn the call over to Suzanne for further comments.