Horses gallop at the start of the Grand National horse race on the final day of the Grand National Festival horse race meeting at Aintree Racecourse in Liverpool, Northern England on April 11, 2015. The annual three day meeting culminates in the Grand National which is run over a distance of four miles and four furlongs (7,242 metres), and is the biggest betting race in the United Kingdom. AFP PHOTO / PAUL ELLIS