It was 2006, and Army Staff Sgt. Brett Johnson of the 1st Ranger Battalion peered through night-vision goggles, slowly moving with his squad toward a house in Iraq with a high-value target inside. They knew there were armed militants nearby, but they had no idea they were about to run into one.
"Right as we were about to break the corner of the building, a guy — unbeknownst to us — was literally coming around the corner with an AK-47," now-Sgt. Maj. Johnson of the 3rd Ranger Battalion recalled 13 years later.