From what I've found, that's Corporal Casey Owens, and photo was taken at George W. Bush's 2nd term inauguration in 2005. Unfortunately, Casey took his own life in 2014.

He said after 9/11 he felt called to fulfill his duty to God and country. His dream was to be a “lifer” in the Marine Corps and he enlisted in August 2002. Once training was completed at the MCRD, he entered into Marine Combat Training in 2002, and TOW gunner training in 2003.
Owens deployed for a second tour in Al Anbar Province in Iraq in August 2004. On September 20, 2004, his vehicle struck two anti-tank mines which resulted in severe injuries to his legs.
After a return to college which proved unsuccessful due to traumatic brain injury, Owens became an accomplished skier and marathon runner in the Paralympic Games.
Owens struggled with post-traumatic stress disorder and alcohol dependence. In a 2012 interview with CBS News, Owens said: "I really don't think I'll ever be free. I don't think the burden of war is ever gone."

https://en.m.wikipedia.org/wiki/Casey_Owens