Snowboarder Chloe Kim's quest for an Olympic halfpipe three-peat was foiled by her protégé. Kim took home silver, edged out in the final round by 17-year-old Gaon Choi of South Korea.

Wisconsin speedskating phenom Jordan Stolz continues his quest to medal in all four of his Olympic events. He's one of a streak of Olympic-record setting speedskating performances in these Games.

U.S. speed skaters competed in the team pursuit Tuesday. The U.S. men are taking home a silver medal in the speedskating Team Pursuit, and more exciting races are coming up this week.

It's been a tough year at the Centers for Disease Control and Prevention. The federal agency tasked with protecting the nation's public health has been weakened by staff and budget cuts. NPR health ...