Was the newest technology on the planet left behind in Pakistan relatively intact? The choppers were so new and secret that most of the Military commanders never saw them. Didn't the pilots know how to fly the things or weren't the pilots familiar with it before they left on the most important mission in recent times? The chopper wasn't shot down or brought down by hostlle forces. It fell out of the sky. Choppers can't hover indefinitely in the same place. It's one of the principals of flying. Nobody was hurt or killed thank God so the conspiracy theory might be that the technology was left behind on purpose in order to even the military playing field.