Answer
Colin Jackson specialised in the 110 metres hurdles event, which is a track and field event in which athletes race over a 110-metre course while jumping over 10 hurdles. Jackson was a very successful athlete, winning gold medals at the 1992 and 1996 Summer Olympics, as well as at the 1991, 1993, 1995, and 1999 World Championships. He is widely regarded as one of the greatest hurdlers of all time.