The Trust for the National Mall held its annual Ball for the Mall May 9. Supporters filled the tent on the Mall near Madison Drive with the goal of continuing maintenance and enhancement of one of Washington’s most traversed treasures, which attracts a staggering 36 million visitors per year. Philanthropist David Rubenstein paid tribute to Sen. Lisa Murkowski (R-Alaska) and the late Congressman John Dingell of Michigan for their dedicated efforts to preserving America’s national parks and conservation.