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A nuclear thermal rocket (NTR) is a type of thermal rocket where the heat from a nuclear reaction replaces the chemical energy of the propellants in a chemical rocket. In an NTR, a working fluid, usually liquid hydrogen, is heated to a high temperature in a nuclear reactor and then expands through a rocket nozzle to create thrust.
Zhou Enlai announces the success of China's atomic bomb test in 1964. A celebration of Chinese nuclear missile tests in Tiananmen Square in Beijing in 1966. Mao Zedong referred to nuclear weapons as a paper tiger which, although they would not determine the outcome of a war, could still be used by great powers to scare and coerce.