Nick Lavery is a U.S. Army Special Forces Warrant Officer (Green Beret) who, in 2013, stepped in front of a machine gun to save a teammate during an "insider attack" in Afghanistan.
The burst severed his femoral artery and shattered his leg, leading to an above-the-knee amputation.
Refusing medical retirement, he endured over 30 surgeries and rigorous rehab.
In 2015, he became the first above-the-knee amputee in military history to return to active combat.
He has since completed elite courses like the Combat Diver Qualification and authored the book Objective Secure.