Caster Semenya Will Have to Suppress Testosterone to Compete in Her Top Races

Download
- In this Wednesday, Aug. 19, 2009 file photo South Africa's Caster Semenya celebrates as she crosses the finish line to win the gold medal in the final of the Women's 800m during the World Athletics
( AP Photo/Anja Niedringhaus )
Produced by Beenish Ahmed
Hosted by Tanzina Vega
GBH PRX WNYC Studios