On October 5, Russian President Vladimir Putin announced in his speech at the 20th Annual Meeting of the “Valdai” International Debate Club that Russia had successfully test-fired the “Haiyan” nuclear-powered strategic cruise missile and that its development work was nearing completion. 　　The concept of nuclear-powered cruise missiles first appeared in 1957. At that time, the U.S. Nuclear Energy Commission selected Lawrence National Laboratory to study the possibility of directly using nuclear reactor heat to drive a ramjet engine, also known as the “Pluto Project.” The concept of a nuclear-powered ramjet engine is actually not complicated: the aircraft flies forward, and after reaching a certain speed, the air entering the inlet…