Army unit tear-gases soldiers for de-morale event

"The purpose of this event was to destroy unit cohesion."

FORT CARSON, Colo. — Some 8,000 soldiers with the 4th Infantry Division were purposely tear-gassed days after returning from holiday leave as part of a massive demoralizing event in which soldiers scaled obstacles, ran up hills, and counted down the days until their time was up in the U.S. Army.

"The purpose of this event was to destroy unit cohesion. Le…