Large dark triangular metalic object w/ metalic arms silently hovering near SW home in Las Vegas, NV following smaller dark objectAround 7am on 9/4/12, my fiance and I witnessed a large silent dark metalic object hovering in the southwest area of our home in Las Vegas, NV. A light was blinking on the top of it, it was triangular shaped with metalic arms surrounding it. It seemed to be following a black metalic ball headed for the north east area of nevada. I reported this to 911, they took a report and said they would investigate. A metropolitan police officer came to my home minutes later for a follow up due to concern for possible objects of terroism. He instructed me to report my sitings to sites such as this. Metro had no other reports concerning this siting.