 Complete the following phrase:  Katie Uhlaender born July 17, 1984 is an American skeleton racer who has competed since 2003. She has won six medals at the FIBT World Championships with two gold womens skeleton: FIBT World Championships 2012, mixed bobsleigh-skeleton team event: 2012, one silver womens skeleton: 2008, and three bronze womens skeleton: 2007, mixed bobsleigh-skeleton team event: 2008, 