 Complete the following phrase:  Nathan Chivers born 18 July 1976 is an Australian guide skier and skis with Bart Bunting, whom he met in high school. In this role, he won two gold medals at the 2002 Salt Lake City Games in the mens downhill B13 and super-G B13 events, and a silver medal at the mens giant slalom B12 event. He also competed with Bunting at the 