I am in Las Vegas. Just a few minutes ago (1230 Pacific time) a pair of Blackhawk helicopters (the variant with the refueling probe on the front) flew from the west and made a left to fly north, directly above the Las Vegas strip. Altitude was less than 300 feet, as they were below the level of my hotel.
Doors were open, and personnel were seen inside. Seems kind of odd, but not the first time seeing spooky stuff here.