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 crew prepares for the re-sail of the 13th race of the America's Cup sailing event against Oracle Team USA, Friday, Sept. 20, 2013, in San Francisco. At right is grinder and team CEO Grant Dalton. The first running of the 13th race was abandoned because of a time limit with the Kiwis far ahead of Oracle Team USA in light, shifty wind. (AP Photo/Eric Risberg)

Emirates Team New Zealand crew prepares for the re-sail of the 13th race of the America's Cup sailing event against Oracle Team USA, Friday, Sept. 20, 2013, in San Francisco. At right is grinder and team CEO Grant Dalton. The first running of the 13th race was abandoned because of a time limit with the Kiwis far ahead of Oracle Team USA in light, shifty wind. (AP Photo/Eric Risberg)

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