Proper posture starts with a good understanding of the muscles that are involved in posture. Several different muscles are responsible for maintaining upright posture, and over time, poor posture can cause these muscles to lose strength.
Air Force. A major in the Air Force typically has duties as a senior staff officer at the squadron and wing level. In flying squadrons majors are generally flight commanders or assistant directors of operations. In the mission support and maintenance groups majors may occasionally be squadron commanders.
PRINCIPLES AND TENETS. The role of the Air Force is to defend the United States and protect its. interests through air and space power, guided by the principles of war and. the tenets of air and space power. Airmen must understand these funda-. mental beliefs as they apply to operations in the air, space, and information. realms. This chapter presents these principles and tenets.