Date of Sighting: November 6, 2009
Time of Sighting: 6:20 MST
Location of Sighting: Longmont, Colorado (About 25 Miles North of Denver)

Description: I was standing outside facing northeast. I spotted three distinct strobe-type white lights in a triangular pattern at approximately 30 degrees above the horizon 40 degrees apart from one another. They traveled from northeast to northwest. The lights were different from the lights used on light aircraft (i.e., the position lights consist of an Aviation Red light on the left side, an Aviation Green light on the right and an Aviation White tail light). There were no position lights and no aircraft noise was audible. I just saw the bright white strobe effect from three different positions in the sky. The distances changed and shifted, but a triangular pattern of some sort was maintained, and after about 8 minutes one of the lights split into two. I watched for several more minutes until they all vanished into the distance over the foothills. Other planes were in the area and could be recognized by their normal aircraft position lights. The sighting lasted approximately 12 minutes.

Note: The witness has presented a good argument that the lights sighted were not from a conventional aircraft.