Four to Five Diamond Shaped Objects in Formation with Strange Movements

Driving north on I-25 just south of the Firestone exit, I looked out the window and to the north-northwest I saw four to five diamond-shaped objects -- white and gray -- moving in formation in strange patterns in the sky. I pointed them out to my wife, who saw them as well. They were so odd in their shape and movement, I almost pulled to car over to look, but since there was heavy traffic, I just slowed down. My wife watched through the sunroof and window, then the back window, and then the object disappeared from view.