UFO News Article:
“Things Have Gone Wrong During Rocket Research”,
19 March 1967 (Reading Eagle, Pennsylvania)

The article mentions that scientists at the White Sands Proving Ground/ White Sands Missile Range, New Mexico made many UFO sightings during missile tests:

http://news.google.com/newspapers?id=xQorAAAAIBAJ&sjid=DZoFAAAAIBAJ&pg=2880,1365115

Map of White Sands Missile Range, New Mexico 

(wikimedia.org image)