"I live a good life....a hard one, but I go to sleep peacefully @ night knowing that I may have made a difference in someone's life."

What civilian police Sgt. Kimberly Munley twittered before her "amazing" and "aggressive performance" rushing toward the Fort Hood killer.

Munley, who is 5'4" and weighs 120, shot Nidal Malik Hasan 4 times. She was shot 3 times.