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National UFO Reporting Center Sighting Report
Occurred : 4/4/2012 17:38 (Entered as : 04/04/12 17:38)
Reported: 4/4/2012 5:35:15 PM 17:35
Posted: 4/18/2012
Location: Albuquerque, NM
Shape: Disk
Duration: 6 minutes
Characteristics: There was an aura or haze around the object, There were aircraft in the vicinity or aircraft chasing the object
One craft at altitude that remained stationary for length on observation. It appeared to be lower than commercial air traffic, because a commercial airliner flew past but did not deviate from a straight flight path. The disc stayed stationary for another 5 minutes before disappearing.

I speculate that the disc was monitoring Kirtland AFB and taking readings of the nuclear materials that are stored on base in the below ground bunkers.