World record holder Michael Phelps takes a doping test after he won his swimming heat in the 100-meter butterfly during the Santa Clara International Grand Prix in Santa Clara, Calif., Friday, June ... more 
World record holder Michael Phelps takes a doping test after he won his swimming heat in the 100-meter butterfly during the Santa Clara International Grand Prix in Santa Clara, Calif., Friday, June 17, 2011. (AP Photo/Paul Sakuma) less 
1 / 1
Associated Press | Photo By Paul Sakuma
Fri, Jun 17, 2011 2:51 PM EDT