(CNN) — Here’s a look at Area 51, a highly classified United States Air Force facility located at Groom Lake in southern Nevada. The US government’s official name for Area 51 is the Nevada Test and ...

-The U.S. Air Force has since confirmed that a fleet of approximately 45 of the officially "retired" aircraft are still being flown for non-combat research and training missions until at least 2034.

A mysterious object of unknown origin fell from the sky and crashed just outside of Nevada's secretive Area 51 military base, ...

Prologue: What is Area 51? -- How nowhere became somewhere -- The skunk works goes to Paradise -- Angels in the blue book -- Angels in red skies -- Angels at the turning point -- Imaging the ...