Caster Semenya Will Have to Suppress Testosterone to Compete in Her Top Races Listen Download Embed Share Share this on Facebook (Opens in a new window) Share this on Twitter (Opens in a new window) Share this via Email - 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 Produced by GBH, PRX and WNYC Studios