Literally, in order for a vortex to be classified as a tornado, it must be in contact with the ground and the cloud base. Weather scientists haven't found it so simple in practice, however, to classify and define tornadoes (per this essay by Doswell).
Bikini Island, 2015. Credit: Emlyn Hughes. (Phys.org)âA team of researchers from Columbia University in New York has found that all of the Marshall Islands involved in nuclear tests by the U.S. are now habitable, except for Bikini Atoll.
Jul 1 â A series of nuclear tests by the USA are conducted at the Bikini Atoll, the activity is known as Operation Crossroads. Mar 17 â In order to protect Europe from Communism, the Brussels Pact is signed. Jun 24 â The Berlin Blockade is a crisis that was borne out of the Cold War and lasts for 11 months.