In 2010-11, when Matthew Ball ’08 was stationed in the Tora Bora region of Nangarhar province, serving in the 4th Brigade of the 101st Airborne Division, he and the other soldiers relied on Qismat Amin, then only 19 years old, for both information and communication with the local Afghan residents. Now a Stanford law student, Ball is on a personal mission: To fulfill what he views as his duty to the young interpreter who worked with him during his deployment. "There's a really strong bond that a lot of soldiers have with interpreters—they're crucial members of the team. ... There…