US Navy pilots have reported seeing a series of unknown objects with no visible engine that are able to reach hypersonic speeds.
Navy pilots reported to their superiors that the objects had no visible engine or infrared exhaust fumes but and that they could reach 30,000 feet at hypersonic speeds.
The strange objects, one of them like a spinning top moving against the wind, also appeared almost daily from the summer of 2014 to March 2015.