On-hand to welcome guests to the special ceremony, which signaled the start of construction of the venue being built on a 16-acre site, were Dan Beckerman, President & CEO of AEG and Jim Murren, Chairman and CEO of MGM Resorts International. Joining the partners to put the first shovels in the ground were Chair of the Board of Clark County Commissioners Steve Sisolak, President of Ultimate Fighting Championship Dana White, CEO of Golden Boy Promotions Richard Schaefer, NBA and NCAA legend and Hall of Famer Bill Walton, NHL legend and Hall of Famer Luc Robitaille and W B C Welterweight World Champion Floyd Mayweather who took time away from final preparations for his Saturday night title defense to participate in this historic ceremony. "We are committed to ensuring that Las Vegas retains its title as Entertainment Capital of the World for generations to come," said Murren. "The addition of this world-class arena, which will attract new events to the market and enable existing events to grow in scale, is an integral component in that strategy. No destination can deliver the level of energy and excitement found in Las Vegas, where every day has the vibe of a big event day." Beckerman said, "We are excited to be breaking ground today on this iconic project. Together with MGM, we have designed an arena with some of the most unique features, offerings and amenities for our fans and sponsors. We look forward to bringing the best sports and entertainment events to this new state-of-the-art arena in one of the most vibrant entertainment markets in the world."