UFO escapes atmosphear with a burst of white and blue light.I was on my way to Phoenix, traveling eastbound on I-10. My exact location was about the 32 mile marker southwest of Salome at the I-10/US 60 interchange. I had been visually scanning the sky since I left my fuel stop in Quartzite because the night was clear and I like to spot meteorites. The section of the sky I saw the UFO in, I had scanned 6 to 7 seconds prior and there was nothing there. I was looking straight ahead, at the sky and road in front of me, when a bright light caught my eye to my left. I had the window rolled down, and was able to immediately dismiss it as a reflection from lights I sometimes see on my right that are reflected off the driver side window.The object was traveling at tremendous speed in a north east direction at a 40 degree declination off the horizon. At first I dismissed the object as falling space debris because of the blue color of the corona around a bright white center. But when the object disappeared, I thought different. Let me explain why. Normally space debris, or meteorites, after entering or burning up in the atmosphere fade out quickly as they cool or loose enough material to no longer burn.In comparison with a Aries V rocket launch I witnessed being launched from Vandenburg Air force Base last Thursday morning, It is my belief that what I saw was not a vehicle entering the atmosphere but leaving. I went to a hilltop, about 3 miles from the rocket launch, to recorded it High Definition Video. From 3 miles away I could see the rocket very clearly. The UFO was traveling twice as fast as the Aries rocket did, and was 3 to 4 times larger in it’s brightness, at a distance of to 20 to 25 miles or more. The distance was figured by the moon lit silhouette of the mountain range to the north and under the UFO. It’s path was in a north east direction headed away from me, and just before it disappeared the brightness intensified for about one second.I feel confidant, with my experience in the military, and my knowledge of aircraft, that this was a vehicle that was traveling at a high altitude and only showed itself when it needed to reach escape velocity. The total view time was only 3 ½ to 4 seconds, and was a beautiful white round burst of energy surrounded by a blue corona of light. It left no contrail, but did leave a short trail of light that followed it closely. It made no discernible noise, my big rig was too noisy to hear it if it did. In comparing it’s size with the half full moon this night, it was large enough to cover half of that. It was an awesome display of power and technology.