Russian Prime Minister Dmitry Medvedev has congratulated the Research Institute of Experimental Physics ahead of the 60th anniversary of the Soviet Union’s first hydrogen bomb test.
In a message sent to the facility in Sarov, in Russia’s Nizhny Novgorod region, Medvedev said the development of the bomb had "become not only an effective instrument to protect national security, but also an important milestone in the construction of a system of global nuclear deterrence, which today provides a durable peace in the world."
The Soviet Union’s first atomic test was on August 29, 1949. Its first hydrogen bomb test took place on August 12, 1953.
Known by the Russians as RDS-6, it was nicknamed "Joe 4" by Americans.
It used a layer-cake design of fission and fusion fuels and produced a yield of 400 kilotons.
Based on reporting by ITAR-TASS and Interfax