Sprinter Allyson Felix poses for a portrait during the 2012 US Olympic Team Media Summit in Dallas, Texas May 13, 2012. After winning a silver in the 400 at last year's world championships and winning the 100 in Doha, Felix, 26, suddenly has a lot of options, including the two relays. She is still looking for her first individual Olympic gold after finishing with silver in the 200 at the last two Games and thinks London could be her best chance. [Photo/Agencies]

Swimmer Eric Shanteau poses for a portrait during the 2012 US Olympic Team Media Summit in Dallas, Texas May 14, 2012. [Photo/Agencies]