2016 Boston Marathon, Mile 1: The Great Unknown

Special | 2m 54s

You can train all you want, preparing yourself physically and emotionally, but the marathon will still surprise you — there’s just so much that can happen in 26.2 miles. As B.A.A. runner Amanda Watters told us: “You have to respect the distance.”

Aired: 04/14/16

Rating: NR

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WGBH is a local public television program presented by GBH.