What was going on the Pakistani side of the border when a NATO airstrike? Exactly what happened in the attack is unclear. U.S officialshave said that Pakistani officials had cleared the NATO air strike, unaware they had troops in the area. A Pakistani official said that is not the case. The official said Pakistani troops fired illumination rounds into the sky to investigate ground movement. At that point the official said NATO began attacking and continued doing so for more than an hour after the Pakistani military notified them of what had happened.