With seven seconds left to go, there was no one to be seen on the ground. Bryant could still have diverted the missile at that point. Then it was down to three seconds. Bryant felt as if he had to count each individual pixel on the monitor. Suddenly a child walked around the corner, he says.

Second zero was the moment in which Bryant’s digital world collided with the real one in a village between Baghlan and Mazar-e-Sharif.

Bryant saw a flash on the screen: the explosion. Parts of the building collapsed. The child had disappeared. Bryant had a sick feeling in his stomach.

“Did we just kill a kid?” he asked the man sitting next to him.

“Yeah, I guess that was a kid,” the pilot replied.

“Was that a kid?” they wrote into a chat window on the monitor.

Then, someone they didn’t know answered, someone sitting in a military command center somewhere in the world who had observed their attack. “No. That was a dog,” the person wrote.

They reviewed the scene on video. A dog on two legs?