Krug is a system similar to the US Classic Bullseye system (which was a ripoff of the German Wullenweber system). Some Krug are reported to be as much as 1km in diameter; this one is decidedly smaller.
42-3374 was built by Douglas Aircraft at Long Beach, California. It rolled from the production line on 26 May 1943 and was accepted by the Army. It was assigned to the 373rd Sub Depot at Dyersburg, Tennessee. Available military records are unclear as to it utilization at Dyersburg or other duty locations. ...
The Lockheed U-2, nicknamed "Dragon Lady", is a single-engine, very high-altitude reconnaissance aircraft operated by the United States Air Force and previously flown by the Central Intelligence Agency. It provides day and night, very high-altitude (70,000 feet/21,000 meters), all-weather surveillance. The aircraft is also used for electronic sensor research and development, satellite calibrati...
The so-called Richat structure in Mauritania, Africa, not a meteor crater but a geological structure caused by the erosion of an ancient volcano.
The 39km wide form was made by the erosion of layers of rock which domed upward. The depression or pit in which the domed rock rings sit is 100m deeper than the surrounding plateau area (darker coloured rock).
The rock ...
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