Holly ‘Cargo’ Harrison completes his 15,000-mile walk to Alaska
04:04Former U.S. Army Ranger Holly “Cargo” Harrison set out a year and a half ago to walk from Argentina to Alaska – and he just completed the 15,000-mile journey in Prudhoe Bay. In this week’s Sunday Closer, NBC’s Harry Smith caught up with him as he made it to the final destination of the trek.