 "Operation Sunbeam" was also known as "Operation Dominic II".The chief milestone of "Operation Sunbeam" was that it was the last nuclear test series on the Nevada Test Site conducted in the atmosphere by the United States.Since "Operation Sunbeam", specifically the "Little Feller 1" test of the "Davy Crockett," all US nuclear tests on the Test Site have been carried out underground in accordance with the Partial Test Ban Treaty.