Major Elizabeth K. O'Brien, of Arlington, Virginia, passed away at her home on Wednesday, February 8, 2012. She was 92 years old. Born in Philadelphia, she was the daughter of the late William J. and Elizabeth (Fell) O'Brien. Major O'Brien also actively served in the United States Air Force for 20 years and retired as a Major in 1972. A graveside service will be held on Thursday, February 16, 2012 at 1 o'clock in the afternoon at Mount Peace Cemetery in Philadelphia, PA. Arrangements by The Oliver H. Bair Co. (610) 449-8585