On June 7, 2012, Jon Harmon was a 19‑year‑old private first class on his first deployment in Afghanistan when an explosion took both of his legs — and nearly his life. Now, exactly 14 years to the day, the former paratrooper will step out of a WWII-era C-47 and jump into the same drop zone where paratroopers of the 508th Parachute Infantry Regiment and the 82nd Airborne fought on D‑Day.“The fates always have an odd sense of irony in my life,” Ha…