FILE - This Aug. 23, 2009, file photo shows United States' LaShawn Merritt showing his gold medal during the medal ceremony for the men's 4x400-meter final at the end of the World Athletics ... more 
FILE - This Aug. 23, 2009, file photo shows United States' LaShawn Merritt showing his gold medal during the medal ceremony for the men's 4x400-meter final at the end of the World Athletics Championships in Berlin. The U.S. and International Olympic committees asked the highest court in sports for a ruling Wednesday, April 27, 2011, on a contentious anti-doping rule that threatens to keep American sprinter LaShawn Merritt from defending his 400-meter title at the London 2012 Games. less 
1 / 1
Associated Press | Photo By Martin Rose, POOL FILE
Wed, Apr 27, 2011 1:28 PM EDT