Sign of the apocalypse? America's Cup yachtsmen now wear helmets

Skipper Jimmy Spithill and his mates aboard Oracle Team USA are on the brink of finishing one of the greatest comebacks in sports history. An America's Cup that had the look of an embarrassing loss comes down to a winner-take-all race Wednesday. And the Yachtsmen will do it wearing helmets.

Emirates Team New Zealand, left, and Oracle Team USA line up in the starting box for the 17th race of the America's Cup sailing event against Tuesday, Sept. 24, 2013, in San Francisco. Oracle Team USA won races 17 and 18 to pull even with Emirates Team New Zealand. (AP Photo/Ben Margot)

Emirates Team New Zealand, left, and Oracle Team USA line up in the starting box for the 17th race of the America's Cup sailing event against Tuesday, Sept. 24, 2013, in San Francisco. Oracle Team USA won races 17 and 18 to pull even with Emirates Team New Zealand. (AP Photo/Ben Margot)

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