Running Man: Are yams the secret to a runner's success?
02:17
Jamaican track and field Olympians, including record holder Usain Bolt, say Jamaican yams are the secret to their success. NBC's Clare Duffy reports.April 19, 2012
UP NEXT
Video shows police dog bite unarmed Texas woman for 62 seconds
01:14
Cheney says ‘our work is far from over’ after losing Wyoming GOP primary
02:03
Hageman celebrates win over Cheney in Wyoming GOP House primary
01:31
Breaking down the Inflation Reduction Act’s impact on healthcare and climate
10:24
Former Trump staffers reveal his tendency to keep classified documents
03:41
Mysterious deaths at Lake Mead indicate possible connection to mob