The injured include Eddie Huckaby, a 53-year-old Krum, Texas, resident who suffered a leg gash when a large piece of metal hit him as he was watching the race, his brother Terry Huckaby told CNN affiliate WKMG.

CNN: February 24, 2013 -- Updated 1551 GMT (2351 HKT)

Terry Conroy, 65, suffered from an abdominal aortic aneurysm in March 2011, which doctors told him he only had a one-in-10 chance of surviving.

BBC: Terry Conroy