Everything looked normal under the columns of the main entrance of the Moscow Bolshoi Theater – a full house, lots of people eager for tickets and scalpers asking for $15, which is a lot for Moscow.But the performance inside was a departure for the Bolshoi. Through its 200-year history, the Bolshoi has been famous for classical ballet and opera, but it was also the scene where Lenin and Trotsky spoke to ardent revolutionary crowds and Stalin greeted mass gatherings of his secret police officers during the great purges of the 1930s.