Lots of lives were saved by an armed civilian. A sheepdog.

Carry a gun. The life you save may be more than your own.

from Debka:

Palestinian tractor driver shot while rampaging in central Jerusalem

March 5, 2009, 1:46 PM (GMT+02:00)

The Palestinian tractor hoisted a police van, injuring two police officers, in downtown Jerusalem at the corner of the Begin and Golomb highways in heavy traffic near the Malha shopping mall. As the tractor driver tried to toss the police van with his shovel onto a bus packed with schoolgirls, a passing taxi driver pulled a gun and shot him dead, cutting the rampage short before it claimed more victims on the jampacked highway.

This was the third time a Palestinian terrorist used a tractor to smash vehicles in downtown Jerusalem.