Kentucky Derby winner Medina Spirit, who provided trainer Bob Baffert with a record seventh win in the race, has failed a drugs test.
Rachael Blackmore becomes the first female jockey to win the Grand National with victory on Minella Times at Aintree.
Rachael Blackmore talks to BBC Sport's Laura Scott about becoming the first female jockey to win the Grand National after she triumphed on Minella Times.
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