Chloe Kim was on a snowboard by age 4, competing at age 6 and winning junior nationals at 7. Her father has since been there just about every step of the way.
Jong-Jin Kim, who was born in South Korea and moved to the U.S. to pursue an engineering degree at Cal State Long Beach, quit his job when his daughter was 8 to support her riding.
He drove her six hours to Mammoth Mountain, Calif., each weekend so she could train, forming a makeshift bed for her in their SUV.
Kim became a halfpipe prodigy, qualifying for the Olympic team four years ago at age 13.