The 1967 U.S.S. Forrestal fire was caused by an errant missile launch, the result of a “safety” ground fault failure. Here is a video of the incident, the investigation, and the findings. While I loathe John McCain, he had absolutely nothing to do with this accident:
https://www.youtube.com/watch?v=6g6l_gjxXM4
Compounded by this https://en.wikipedia.org/wiki/1967_USS_Forrestal_fire which explains the bombs detonating afterwards.