Armstrong becomes road cycling's oldest Olympic gold medalist

HAMPTON COURT, England (AP) -- Cyclist Kristin Armstrong of the United States won her second straight Olympic time trial gold medal Wednesday.

The former two-time world champion covered the 18-mile course south of London in 37 minutes, 34.82 seconds, beating silver medalist Judith Arndt of Germany by more than 15 seconds.

Olga Zabelinskaya of Russia added a bronze to the one she captured in Sunday's road race.

The 38-year-old Armstrong briefly retired after her triumph at the 2008 Beijing Olympics to start a family. But after delivering a son in 2010, she hopped back on the bike, with the London Games her primary focus.

She led by a second at the first time check, and the gap only grew as Armstrong barreled toward the finish at Hampton Court Palace.