Terrorist Attacks And Training Exercise Connection

Why do terrorist attacks keep happening during Government training exercises?
9/11 terrorist training exercise, 7/7 terrorist training exercise, Oslo bombings terrorist training, Madrid training exercises. Seems every time the Government does a training exercise against terrorism a terrorist attack happens shortly after. What is the connection?

Training Exercise on 9-11. Sound familiar

Boston Marathon Bombing.. Admitted Training and Bomb Sniffing Dogs
Once again there is a terror attack that happened at the exact time of an admitted training exercise. 9/11, the London 7/7 bombings.

With in 1 hour of terrorist training in Oslo there was a terrorist attack exactly the same type of attack they were training for.

London 7/7 terrorist attack during training exercise

Underwear bomber put on plane by government eye witness