Two circular crafts with blue circular lights were seen in San Diego on 21 March 2009 40 mins after midnight.At approximately 40 minutes past midnight on Saturday morning 3/21/09 I observed two round disc shaped objects estimated to be 15 to 20 feet in diameter approximately 1500 feet in elevation near Mission Valley just east of my home. Each disc had eight bright blue circular lights around the perimeter of the craft. The lights were estimated to be 14-16 inches in diameter. They were hovering and making quick small motions darting slightly left than right and up and down. One of the two craft even slightly wobbled for a couple seconds. One of the craft than appeared to dart away completely east and disappeared. Excited I woke my wife a she saw the same thing. We also overheard some neighbors two houses down the street talking in an excited manner about the crafts, so we are not the only ones to have witnessed this. The remaining craft slowly lowered down than disappeared. One more thing the blue lights occassionally dimmed about three times and once when out completed for a second before becoming bright again. One more thing there were no sounds. I am a electrical engineer for the DoD and must insist my name be kept anonymous.I have provided my contact info if you would like to talk to me.