The Myasishchev M-4 Molot (Russian: Молот (Hammer), USAF/DoD reporting name "Type 37",[2][3] ASCC reporting name Bison[4]) was a four-engined strategic bomber designed by Vladimir Mikhailovich Myasishchev and manufactured by the Soviet Union in the 1950s to provide a Long Range Aviation bomber capable of attacking targets in North America. The aircraft fell well short of its intended range and was not fully capable of attacking the most valuable targets in the United States. As this became clear, production was shut down. In spite of the failure to produce a capable strategic design and the resulting small numbers, the M-4 nevertheless sparked fears of a "bomber gap" when 18 of the aircraft were flown in a public demonstration on May Day in 1954. The US responded by building thousands of Boeing B-47s and B-52s to counter this perceived threat.