Original sentence: Four days before the accident, on June 20, an emotionally disturbed ex-USAF airman whom had been stationed at Fairchild ABF was was sent to Wilford Hall Medical Center at Lackland AFB for Psychiatric Evaluation entered Fairchild's hospital and shot and killed five people and wounded many more before being killed by an Air Force Security Forces member.The Disturbed airman was reassign to Cannon AFB for duty was discharge shortly afterwards for mental issues, an had returned to Fairchild AFB to seek revenge on the two Mental Health doctors that first sought his Discharge for mental instability
Edited sentence: Four days before the accident, on June 20, an emotionally disturbed ex-USAF serviceman entered Fairchild's hospital and shot and killed five people and wounded many more before being killed by an Air Force Security Forces member