It is one of the world's most iconic sporting events and watched by millions each year. But while the Grand National is an opportunity for racing fans to dress up, watch some scintillating action and maybe even win some money, there is a dark and sad side to the steeplechase, with many horses losing their lives at Aintree over the years.
Three horses have died during the three-day racing festival this year.
There are 13 vets on site and they were, unfortunately, called into action during the showpiece Grand National race. A green screen was erected around a horse named Hill Sixteen at the first fence. Hill Sixteen had a bad fall early and was immediately seen to by the vets, with the horses having to run around the fence where the 10-year-old was being treated.