Stock watch:

Darts draw big crowds in UK

CBSTV Videos 0:30 mins

Learn from R.A. Dickey and scientists why the "knuckler" flits, meet Doug O'Neill, the controversial trainer with another horse in this year's derby and find out why darts in the UK have become a TV spectacle. Watch 60 Minutes Sports on SHOWTIME Wednesday, May 1 at 9 p.m.

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