UFO Sighting in Naugatuck, Connecticut on December 24th 2012 - Lights moving in formation without sound and a low cloud cover.

I was called outside on Christmas eve night. My son pointed out five lights in the sky moving together. They became three lights and change position from 3 on top and two on bottom type formation to a triangle formation as they moved away without sound. There was a low ceiling and it began to snow about 15 minutes later. This was observed by my two sons and by myself.