The North American Aviation X-15, Douglas X-3 Stiletto, and Convair XFY Pogo aircraft were never flown out of, or stored at Area 51. The X-15 flew from Edwards AFB, California, between 1959 and 1968, and was carried aloft on the right wing pylon of the B-52 mothership. The X-3 also flew from Edwards between 1952-1956. Pogo was primarily tested at Moffett Field, California. Also, the X-15 was never referred to as the "Stogie" as was done on Project Blue Book.
In response to the information that he's going to have a "liquid lunch", Banks states, "That's not how I roll, Captain." But that slang phrase did not exist in the 1950s.