Lockheed XQM-60 "Kingfisher" (Picture I) http://crisisofdemocracticstates.blogspot.fi/p/lockheed-xqm-60-kingfisher-early.html Kimmo Huosionmaa I found an article at Internet or Wikipedia, where was told a story of XQM-60 "Kingfisher" target drone, what had the capacity to speed of mach 4,3. This ramjet- propelled drone was in operational in 1951, and this thing was meant that the United States Air Force had the capacity to make hypersonic cruise missiles in 1950's. In this drone had the same capacity to strike targets than some Tomahawk cruise missile. This kind of drones was officially made for anti-ballistic missile simulations, but there are so many details in this drones history, that I think the real purpose of that project was creating the very fast missile, what had the capacity to destroy targets by using kinetic energy. That means that "Kingfisher" might use as the model to create those extreme powerful missiles, what have the ca...