The following exert is an eye witness statement. Please read into it what you will. This has been reported to mufon who I am sure are investigating:
My wife who is a commercial rated pilot and i were at the flamingo pool when she pointed out a white orb (looked to me like an aspirin without distinct edges-wavy) streaking across the sky above the rooftop of the hilton grand vacations at mach plus (testing our hyper-flight tech?). it was seen for about 30 seconds, in a cloudless sky at about noon. it went behind the spokes of the high roller and past nellis a.F.B., when we lost sight of it. the picture included was taken seven hours later from our room and is for a reference only. the object was seen travelling from the right to the left at about 45 degrees above the horizon in a straight line, without a contrail.