Pulsating lights in Southern Arizona along I-8 by BMG Air Force RangeMarch 23, 2009 It was nighttime, between 8 and 10 or so, driving westbound on I-8 in Arizona. I believe at the time the Barry M. Goldwater Air Force Range was directly south of us.We saw one pulsating light, I think it was orange, for a few minuets. Then other lights popped out of nowhere. They were fairly far away. They did unnatural formations around each other. They weren’t fixed in place. Occasionally they would disappear, and then the main one would come back and pulsate for a little while.One of their formations seemed to be the stair stepping formation. Sometimes they would pulsate while they where flying. It was obvious that they weren’t fixed in place as sometimes they would fly fully lit in formations.Their altitude varied in height constantly, which was what was so unnatural about it. They were probably no more than 30,000 feet. They would fly as if gravity didn’t matter.They were directly south of us almost the entire time, almost as if they were going along with us. As we got further west, we thought they were done but eventually the one pulsating light came back again. It stayed until we drove further west and finally seemed to not be going along with us. I know I wasn't the only one to see this as there were many others driving that night.My biggest regret is not stopping to get my camera out of the trunk!