Florida sophomore Kerron Clement broke Michael Johnson’s world 400-meter record Saturday night, an unexpected display of speed that overshadowed team titles for the Arkansas men and Tennessee women at the NCAA Indoor track and field championships.

　　Photo : Florida’s Kerron Clement, left, and Louisiana State’s Kelly Willie round a curve in the 400 meter run during the NCAA Division I Indoor Track and Field Championships in Fayetteville, Ark., Saturday, March 12, 2005. Clement won the event in world record time at 44.57 seconds. Willie finished third with a time of 45.41 seconds.