A very bright green streak accompanied by a bright flash with what looked like a small glowing ball leading the streak. Lasted 2 seconds. I was looking SW towards Pittsburgh International Airport when the streak occurred. Streak did come at roughly 45 degree angle moving from SW towards airport from my location. 2 other witnesses. Occurred at 12:00am 9/28/13. Direction observed
40degrees 27'0" N, 80degrees 4'34" W. moved roughly from 238 SW to 259 W.