American medals in summer & winter games

"[USA's] Lauryn Williams takes silver in bobsled, just misses Olympic history" ...
American Lauryn Williams became just
the fifth person to win medals at both
the Summer and Winter Olympics. In
Sochi, she was part of the two-person
bobsled team that took silver. Williams
won a gold medal at the 2012 Games as
part of the U.S. 4x100 relay team...."
http://www.cbsnews.com/videos/lauryn-williams-takes-silver-in-bobsled-just-misses-olympic-history/