Paris Attacks - Stadium Plot Failure

This is a great example of how effective security of a venue stopped a potentially much worse attack on the French stadium. A suicide attack inside would have forced an evacuation, where the other waiting suicide bombers were waiting. Instead the stadium security staff put the venue into a silent lockdown, which foiled the plans of the suicide attacks waiting outside. They instead chose to blow themselves up without any significant crowd to target.

http://www.wsj.com/articles/attacker-tried-to-enter-paris-stadium-but-was-turned-away-1447520571