 Complete the following phrase:  She was a somewhat unusual athlete in that she had become a two-time Olympian before she had competed at a World Championships in Athletics. Her first World Championships in 2009 ended with a sub-par performance in the discus final, but in 2011, she placed sixth. In 2012, she secured her third trip to the Olympics, after a definitive performance at that years American Olympic trials. Still, the best-performing American of 2012 finished off the medals podium 