Your notion that Gotti was somehow invincible or too feared to be killed is ridiculous. Killed at a meeting with bosses? Yeah right. First off the Bonanno and Colombo leaders were on his side so you could rule them out. 2nd of all no way would he have been killed at a meeting with bosses, all at the same place. Gotti was living on borrowed time. The feds got him before his enemies in the mob could, plain and simple.