This document, "Medical Operations (Air Force Doctrine Document 4-02)," establishes doctrinal principles for Air Force medical forces in support of worldwide operations. It reflects the simultaneous medical missions supporting contingency operations, home station health care, and disaster response/humanitarian assistance. Additionally, this document highlights the importance of aeromedical evacuation to the warfighter. Since October 2001, over 85,000 injured Soldiers, Sailors, Airmen, and Marines supporting global operations were successfully moved from the front lines to proper medical care. Our medical forces are critical to maintaining the health and esprit de corps of the joint force.