1982: Ray Mancini defeats South Korean boxer Duk Koo Kim in a boxing match held in Las Vegas. The fight, which was punishing for both boxers, is stopped 19 seconds into the 14th round with Mancini declared the winner by TKO. Minutes after the fight, Kim, 23, collapses into a coma and is taken out of the arena on a stretcher. At the hospital, he's diagnosed with a subdural hematoma and undergoes emergency brain surgery, but he would die four days later. His death would lead to significant changes in the sport designed to protect the health of boxers, including reducing title fights from 15 to 12 rounds, increasing the number of ring ropes from five to six, and introducing new medical procedures to fighters' pre-fight checkups.