Dave Horton began his career with Hilton Hotels & Resorts as a busboy. Today, he is the global head of the Hilton Hotels & Resorts brand, spearheading an interdisciplinary global team and leading a portfolio of more than 540 hotels and resorts. Horton's portfolio is continuing to grow — both this year and into 2011 — as the brand is adding 70 new locations. TravelAge West recently spoke to Horton to discuss the expansion and brand of Hilton Worldwide.