** FILE In this Aug. 17, 2008, file photo, United States' Michael Phelps displays his eighth gold medal after the men's 4x100-meter medley relay final during the swimming competitions in the National Aquatics Center at the Beijing 2008 Olympics in Beijing. Phelps acknowledged "regrettable" behavior and "bad judgment" after a photo in a British newspaper Sunday, Feb. 1, 2009, showed him inhaling from a marijuana pipe. (AP Photo/Mark J. Terrill,file)