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.
Although it was the newest service, the Air Force emerged as the United States' primary military arm during the first decade of the Cold War. As General Thomas D. White, Air Force vice chief of staff, claimed, the Air Force had been recognized as an instrument of national policy.2.