The Tupolev Tu-360 was a proposed hypersonic strategic bomber conceived by the Tupolev design bureau in the 1980s.
Although some sources refer to it as the Tupolev Tu-2000B, largely because it utilized the same liquid hydrogen ramjet engine technology as the Tu-2000, it was officially called Tu-360 in the project index.
Speeds at Mach 6 required the use of liquid hydrogen, and the weapons were to be housed in two bomb bays.
[2] Tupolev planned to build a subscale technology demonstrator weighing 176,370 pounds (80,000 kg) to test the flight characteristics of the Tu-360, but a lack of funds following the fall of the Soviet Union meant that the project was axed in 1992.
[1][3][4] Data from https://www.testpilot.ru/russia/tupolev/360/General characteristics Performance Armament