The dome that opened in 1992 was flattened in 15 seconds at 7:30 am. The Georgia World Congress Center Authority said prior to the blast that it should take 12 seconds for the explosives to go off plus another 3 seconds for sections of grandstands to be on the ground. The 71,250-seat dome -- which was the site of high school football state championships, Peach Bowls, SEC championship games, two Super Bowls, 1996 Olympic basketball, three Final Four NCAA basketball tournaments, concerts, pro wrestling and other events -- has been replaced by the $1.6 billion Mercedes-Benz Stadium next door.