Russia’s supersonic bomber, the XB-70 Valkyrie, was rendered obsolete before its flight.
Summary: The Air Force’s XB-70 “Valkyrie” supersonic bomber was designed to replace the B-52 Stratofortress with its advanced speed, capable of reaching Mach 3. The Kennedy administration decided to cancel the program as the Soviet Union’s advanced S-75 Dina and MiG-25 Foxbat air defense systems made the XB-70 obsolete before it entered service. The XB-70 Valkyrie: … Read more