 In 2000 and 2004, Hennagan won Sydney’s and Athens’ Olympics, respectively, for the women’s 4 x 400 metre relay; also, 4th place Champion in 400m at the 2004 Olympic Trials.Hennagan earned 2nd place finisher at IAAF World Athletics Finals 400m.She received a gold medal for the women’s 4 x 400 metre relay at the 2007 World Championship in Athletics.