Jason Aldean is mourning more than just the loss of a dear friend, he's also mourning the loss of the man who may have saved his life. On Aug. 25 the country singer publicly paid tribute to his longtime security guard Ryan Fleming — Ryan was the person who pulled Jason off the stage when a gunman opened fire during a Las Vegas concert in 2017.Still the biggest mass shooting in United States history, 58 people lost their lives that day and over 800 more were injured.