A couple of years back...between 97-98.Im not sure.I was living in Las Vegas and I lived in a sixth floor apt. building on swenson and twain ave. I saw two disc shaped objects ( blended in like street lamps) side by side between the hours of 8:00 - 12:00 midnight They hovered toward me slowly.Gliding through the district like its nobodies business. A police helicopter was flying around with its spotlight on the ground. just below the disks. I dont think the helo pilots knew though. Approx. altitude was between 200 - 300ft. if that. The disk on the left had started to jitter a little. Acended upward slowly gaining altitude: progressing to a higher rate of speed. I spoke to a friend at work the following day ;he told me two kids from the UNLV area saw lights in the sky jolting around and called the Art Bell show to report the incident. Question: Is it possibile that whoever is piloting those alien craft can tell when somebody is watching them. Question 2: Do you think the disks camoflage themselves in cities to avoid detection? My final question is could you tell me if any report like this one came across the lines? Is it possible to give me a response?