Tony Stark traveled through the Kunar Province in a Humvee convoy during a business trip to Afghanistan in order to host a demonstration of the Jericho missile for the United States Air Force. He refused to travel in the same Humvee as James Rhodes, and while chatting with the airmen assigned to escort him, the convoy was attacked by members of the Ten Rings terrorist group. The soldiers were killed and while trying to flee, Stark was affected by the explosion of one of his own weapons, causing a large amount of shrapnel to penetrate his Bulletproof Vest and injure him.
Rescue of Tony Stark
In the alternate universe, Tony Stark and the United States Air Force convoy were attacked by the Ten Rings as well, however, Stark was rescued by Erik Killmonger. Aware that Stark was their target, Killmonger abandoned his unit and arrived to help Stark, gunning down the Ten Rings operatives and evacuating Stark to safety.