Is this the year Pletcher breaks through?

For all trainer Todd Pletcher has accomplished in thoroughbred racing, he's never won a Kentucky Derby. He's 0 for 19 heading into this year's Run for the Roses, scheduled for Saturday, May 2.
This year, he's got a lightly-raced colt named Dunkirk who has won both of his starts impressively but gets his first big test in Saturday's $750,000 Florida Derby, one of the major steppingstones to the big dance in Louisville.