25 miles south of Tucson. ((NUFORC Note: U. S. Navy missile launch. PD))Bright white light emerges on cloudless clear night like the moon breaking out of clouds. The light gets very bright and well defined like a bare clear spotlight bulb. Then the center bright definition turns into a gigantic glowing sphere of light filling a area in the sky that would fill the area of outstretched arms spread apart 6 inches outside of body. Huge. Then it stayed that way for 10 min and then slowly drifted away over another 10-15 min. This glowing sphere of light was very bright and well defined. There were no aircraft lights or movements. It was at an elevation of maybe 30 degrees off the horizon.. We have pictures but they don't show the clarity of the actual event. One of the witnesses is a retired NASA engineer. We are close to the border, and an airforce base. We see helicopters and jets all the time. This was not either. We also saw a faint beam of light going to the ground from the side of the sphere for awhile.((NUFORC Note: Witness elects to remain totally anonymous; provides no contact information. PD))