see more

ATLANTA, GA - JULY 23: David O'Conner of the US rides Giltedge through the water during the Olympic equestrian three-day endurance event 23 July in Atlanta. (Photo credit should read MICHAEL JUNG/AFP/Getty Images)

ATLANTA, GA - JULY 23:  David O'Conner of the US rides Giltedge through the water during the Olympic equestrian three-day endurance event 23 July in Atlanta.  (Photo credit should read MICHAEL JUNG/AFP/Getty Images)