The U.S. is still looking for its first cross-country gold, and Caldwell, 23, could provide it. A collision knocked her out of contention in the sprint final, but her sixth-place finish was the best ever by a U.S. woman.
In 2008, at age 15, Hansen became the youngest-ever junior world luge champ. She won nationals last year despite a broken foot and was 10th in Sochi—while drawing attention with her prerace dancing.
The 17-year-old with a name destined for a podium had to withdraw in Sochi after dislocating her shoulder. She has a world title in halfpipe and an X Games bronze in superpipe, and her best lies ahead.
Had the freestyle skier not broken her right fibula just before the Games began, Voisin, at 15 years and two months, would have been the youngest U.S. Winter Olympian since 1972.
As a 13-year-old in 2008, Bohonnon was the youngest skier ever accepted to the U.S. ski team's development program. In Sochi he placed an impressive fifth in aerials at age 18.
A silver medalist in the superpipe at the X Games in January, the 13-year-old was too young to be eligible to compete in Sochi. In four years she could head to her parents' homeland for the Olympics.
SIMON BRUTY/SPORTS ILLUSTRATED (CALDWELL)
TOBIAS HASE/EPA/LANDOV (HANSEN)
JULIE JACOBSON/AP (A. GOLD)
JULIE JACOBSON/AP (VOISIN)
LUCAS JACKSON/REUTERS (BOHONNON)
DOUG PENSINGER/GETTY IMAGES (KIM)