According to Wikipedia: "The English Electric Canberra is a British first-generation jet-powered light bomber manufactured in large numbers through the 1950s. The Canberra could fly at a higher altitude than any other bomber through the 1950s and set a world altitude record of 70,310 ft (21,430 m) in 1957. Due to its ability to evade the early jet interceptors, and its significant performance advancement over contemporary piston-engined bombers, the Canberra was a popular export product and served with many nations."