The Dangers of Disarmament, and of relying on others to protect you.

Sometimes they won't.

There were armed policemen hiding all around the station but none of them did anything," he said. "At one point, I ran up to them and told them to use their weapons. I said, 'Shoot them, they're sitting ducks!' but they just didn't shoot back.

and

"I told some policemen the gunmen had moved towards the rear of the station but they refused to follow them. What is the point if having policemen with guns if they refuse to use them? I only wish I had a gun rather than a camera." [emphasis mine]

From an interview with a photographer in Mumbai, about the terrorist attacks.