A United States Marine attending a week-long military training session in Nevada won more than $2.8 million playing the Bally Tech slot Money Vault slot machine at the Bellagio Las Vegas on Sunday, Feb. 19, 2012 (Photo credit: BusinessWire). Bally’s Millionaire Sevens wide-area progressive slot link hit for $2,882,808.32, the second-largest jackpot ever won on a Bally Technologies game. “I was overwhelmed and in shock,” said winner Alexander Degenhardt, 26. “I didn’t know what to do.” Degenhardt and a Marine buddy had decided to have some fun when they got a break from training at nearby Nellis Air Force Base,…