Sorry if it's a repost.
Via Threat Level
The Department of Homeland Security is funding the creation an LED flashlight that uses powerful flashes of light to temporarily blind, disorient and incapacitate people. Homeland Security's Science and Technology arm hopes government agents can use the "light saber" to arrest people on planes and at the borders without using traditional weapons.
I wonder how this compares to the already widely available personal defense lights from Surefire, etc?