Kerron Clement of Trinidad broke American great Michael Johnson's 10-year-old 400m indoor world record here Saturday, clocking 44.57sec at the NCAA US collegiate indoor athletics championships.
Clement, 19 and representing the University of Florida, broke the mark of 44.63 set by Johnson on March 4, 1995, at the US Indoor championships in Atlanta, Georgia.
Clement easily outdistanced the University of Arkansas' Terry Gatson, who finished in 45.29sec.
Johnson still owns the 200m and 400m outdoor world records.