The worst example was the most lethal terrorist attack in France since WWII. As the Islamic terrorists slaughtered innocent people in the Bataclan theatre, the police waited outside for over two hours before they bravely decided to enter the building and draw chalk outlines.
So, this is no surprise:
That popping sound you just heard is the explosive end of the media's most recent failed trial balloon sent up to generate a groundswell of support for gun control. It has now been reported that the armed policeman whose job it was to guard Douglas High School in Parkland, Florida, ran and hid rather than confront the accused gunman.