Wikipedia: The Boeing B-47 Stratojet jet bomber was a medium-range and -size bomber capable of flying at high subsonic speeds and primarily designed for penetrating the Soviet Union. A major innovation in post-World War II combat jet design, it helped lead to the development of modern jet airliners. While the B-47 never saw major combat use, it remained a mainstay of the U.S. Air Force's Strategic Air Command (SAC) during the 1950s and early 1960s.
