Nation US Army soldier Ryan Knauss, 23, ‘a Tennessee volunteer,’ killed in Afghanistan airport attack August 27, 2021 Knoxville News Sentinel Comments Off on US Army soldier Ryan Knauss, 23, ‘a Tennessee volunteer,’ killed in Afghanistan airport attack Ryan Knauss, 23, had already served a nine-month deployment in Afghanistan. He grew up in Tennessee and joined the Army out of high school.