A London bus that has been transformed into a robotic sculpture by Czech artist David Cerny is assembled in front of the Czech Olympic headquarters in London July 22, 2012. The bus, which Cerny hopes could become an unofficial mascot of the London 2012 Olympic Games, does push-ups with the help of an engine powering a pair of robotic arms and the motion is accompanied by a recording of sounds evoking tough physical effort. It will be parked outside the Czech Olympic headquarters in London for the duration of the Games. [Photo/Agencies]