100 days from now, the Olympic flame will be lit in London.  Arguably no spotlight is greater than the one shining on Usain Bolt, the fastest man on the planet. NBC's Lester Holt traveled to Bolt's homeland of Jamaica to meet the king of the track.  Watch Lester Holt’s full report, “Running Man” Wednesday April 18 at 9/8c on NBC’s Rock Center with Brian Williams.