US teen Missy Franklin competes in 100 backstroke

July 30, 2012: United States' Missy Franklin reacts to her gold medal win in the women's 100-meter backstroke swimming final at the Aquatics Centre in the Olympic Park during the 2012 Summer Olympics in London. (AP2012)

American teenager Missy Franklin won the women's 100-meter backstroke at the London Olympics on Monday.

Franklin won the two-lap race in 58.33 seconds for her first Olympic gold and second medal after taking bronze in the 4x100 freestyle relay.

Emily Seebohm of Australia touched in 58.68 to take the silver medal and Aya Terakawa of Japan finished in 58.83 to take bronze.

Franklin swam little more than 10 minutes after taking the eighth and final qualifying spot in the 200 freestyle semifinals.