London Olympics Athletics Mens

David Rudisha celebrates after breaking his own world record in the 800 meters. (Morry Gash -- Associated Press)

David Rudisha celebrates after breaking his own world record in the 800 meters. (Morry Gash — Associated Press)

Kenya’s David Lekuta Rudisha reacts after winning the men’s 800-meter finals in the Olympic Stadium at the 2012 Summer Olympics, London, Thursday, Aug. 9, 2012. (AP Photo/Morry Gash)