349th Aerospace Medicine Squadron chief retires Published Nov. 30, 2012 By Senior Master Sgt. Ellen Hatfield 349th Public Affairs TRAVIS AIR FORCE BASE, Calif. -- Chief Master Sgt. Roxie Walker-Jones accepts the folded flag of our country at her retirement ceremony Nov. 18 here. She retired as the senior air reserve technician at the 349th Aerospace Medicine Squadron, after a long and rewarding career.