Objects of light seen below cloudsI was flying into Denver International Airport on August 1st, 2008, from El Paso. Our plane initially approached from the south, then turned east to land on a different runway. After the plane had turned east, I was watching the ground, looking at the cars and houses and farm fields around DIA. There were clouds beneath us. I was watching the things on the ground when a white sphere of light coming from underneath a cloud caught my eye. I dismissed it as the sun's reflection off of an airplane or a windshield, or possibly a light on top of a communications tower, this area being a loosely populated area with a high amount of air traffic. I then questioned my initial dismissal when from beneath the cloud I observed two more, and noticed how the ground was moving beneath them, in a formation with the first observed. This was in the course of a few seconds. I watched this group, traveling west, but our plane and the formation of lights were traveling in opposite directions and I could no longer see them for the clouds and the window well obstructing my view. I shrugged my shoulders, and continued to watch the ground. I saw a white light, moving in a squiggly path, traveling south. I saw it only momentarily, before it was obscured by another cloud. We landed and I saw nothing further afterward.The flight was a Frontier flight. The aircraft was a Bombardier turboprop. I was seated forward of the propellers.I am a Cavalry Scout. I was deployed to Iraq for all of 2007. I have training in identifying vehicles on the ground and can identify a number of aircraft in the air as well. I have been in the service for three years.I could see no fuselage on any of the aircraft, but it's possible that I was at too high of an elevation (I was above some spotty clouds, these were below) to be able to see anything beyond the shining lights. It's also feasible that this could have been a formation of fighter jets, performing training maneuvers out of Buckley Air Force Base, though a bit near the International Airport.