The ceremony, attended by nine-time Olympic Gold-medalist Carl Lewis and three other US Olympians, coincided with a ceremony in London’s Trafalgar Square where International Olympic Committee President Jacques Rogge invited sportsmen and women from around the world to compete in next year’s Olympic and Paralympic games.

Ban powered up the clock at exactly 2:30 p.m. EDT Wednesday, the equivalent of 7:30 p.m. in London.