This article is about the athlete. For the video game character, see Clock Tower.Jennifer Simpson (née Barringer) (born August 23, 1986) is an American middle distance runner and steeplechaser. She represented the United States at the 2008 Beijing Olympics and 2012 London Olympics. She won a gold medal in the 1500 meters at the 2011 World Championships in Athletics and silver in the same event in 2013.