FILE - This Friday, May 18, 2012 file photo aerial view, made from a hot air balloon, shows the new National Stadium, ready for the Euro 2012 football games, in Warsaw, Poland. The stadium is located in one of Warsaw's most popular neighborhoods: Saska Kepa, an enclave of towering trees and homes built in the modernist style of the 1920s and 1930s. (AP Photo/Czarek Sokolowski, File)