Area 6 revealed: Top-secret Nevada facility rumored to be where the Pentagon tests high-tech unmanned drones to detect terrorist dirty bombs is as ultra hush-hush as the more infamous Area 51

Area 6 (pictured), which was once used for underground nuclear testing

Area 6 revealed: Top-secret Nevada facility rumored to be where the Pentagon tests high-tech unmanned drones to detect terrorist dirty bombs is as ultra hush-hush as the more infamous Area 51:

A shielded Nevada airbase used by government agencies to test unmanned aircraft has shown up on Google Earth.

Area 6, which was once used for underground nuclear testing, is located in Yucca Flat and is part of the Nevada National Security Site, where 1,000 nuclear tests were conducted between 1945 and 1992.

Four tests and six detonations happened in Area 6 according to a report by the US Department of Energy.

Now, the airbase, which has a 5,000-feet runway, houses aircraft tests for federal agencies such as the Department of Defense and that of Homeland Security, the Las Vegas Review-Journal reported.

Read moreArea 6 revealed: Top-secret Nevada facility rumored to be where the Pentagon tests high-tech unmanned drones to detect terrorist dirty bombs is as ultra hush-hush as the more infamous Area 51