This artist's rendering provided by MGM Resorts shows the proposed sports arena in Las Vegas. Officials are set to break ground Thursday, May 1, 2014, on this new, 20,000-seat arena along the Las Vegas Strip that would improve the city's chances of attracting professional sports teams. Casino company MGM Resorts International and sports and entertainment giant AEG are marking the occasion with a ceremony. (AP Photo/MGM Resorts)
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