 Complete the following phrase:  Competing on the senior level, Nam won the silver medal at the 1999 U.S. Championships, behind Michelle Kwan. She subsequently received endorsements in South Korea and appeared on The Tonight Show with Jay Leno. As Nam did not meet the ISUs age criteria for the 1999 World Championships, 4th-ranked U.S. lady Sarah Hughes was sent in her stead. Although Hughes was also not old enough, she had an exemption due to her medal at the 