Then, 30 years later, in the 1970s, the B-1B Lancer prototype bomber was designed as a replacement for the B-52 and could reach Mach 2.2 (1,688 miles per hour). Another prototype that never made it ...

Though today seen as slow, floating billboards, blimps once played a pivotal and unexpected role in World War II by helping the U.S. Navy hunt Nazi U-boats in the Atlantic. In 1942, as German ...