News 521st AMOG changes command August 21, 2014 Photo by Mass Communication Specialist 2nd (SW) Grant WamackCol. Timrek C. Heisler receives the 521st Air Mobility Group guidon from Col. Nancy M. Bozzer, commander of the 521st Air Mobility Operations Wing, during a change of command ceremony at Naval Station Rota, Spain. Col. Carlos H. Ortiz (right) relinquished command of the 521st AMOG to Heisler during the ceremony. Tags: 521st Air Mobility Group « Previous × Next » Share Tweet