Shani Davis of the U.S. skates in the prototype of the official US Speedskating suit during a training session at the Adler Arena Skating Center in Sochi, Russia, Friday. As U.S. skates have fallen short of their goals at the Winter Olympics, some skaters have asked to switch to their old suits. Matt Dunham/AP hide caption

itoggle caption Matt Dunham/AP

American short track speedskater Simon Cho (center) admitted last October that he sabotaged the skate blade of Canadian athlete Olivier Jean (left). The two are pictured here in 2011, at a different event. Alex Livesey/Getty Images hide caption

itoggle caption Alex Livesey/Getty Images

Speedskaters practiced for the U.S. Single Distance Short Track Speedskating Championships in Kearns, Utah, last year. Rick Bowmer/AP hide caption

itoggle caption Rick Bowmer/AP