The Boeing, US Air Force, B-50 Superfortress was a strategic bomber--nuclear capable, long-range subsonic, and high altitude bomber. Conceived and built just after World War II, the aircraft saw action during the Vietnam War. Although its design is similar to its predecessor, the B-50 is in fact an upgraded B-29. Equipped with Pratt and Whitney R-4360 radial engine, the B-50 was more powerful. The improved Superfortress even featured stronger and lighter wings made of 75ST aluminum alloy. The most glaring difference is the aircraft's purpose: the B-50s primary mission was to deliver nuclear bombs to Soviet Russia. The B-50 Superfortress was later used to collect intelligence during the Cold War. Designed in an era before supersonic jet interceptors, the B-50 airplane became outdated sooner than expected. The introduction of the Soviet MiG-15 made the Superfortress’ popularity rapidly decrease as it became glaringly obsolete, and a danger to her crew.