The strange objects, one of them like a spinning top moving against the wind, appeared almost daily from the summer of 2014 to March 2015, high in the skies over the East Coast. Navy pilots reported to their superiors that the objects had no visible engine or infrared exhaust plumes, but that they could reach 30,000 feet and hypersonic speeds. "These things would be out there all day," said Lt. Ryan Graves, an F/A-18 Super Hornet pilot who has been with the Navy for 10 years, and who reported his sightings to the Pentagon and Congress. "With the speeds we observed, 12 hours in the air is 11 hours longer than we'd expect." No one in the Defense Department is saying that the objects were extraterrestrial. Lieutenant Graves and four other Navy pilots, who said ... that they saw the objects in 2014 and 2015 in training maneuvers from Virginia to Florida off the aircraft carrier Theodore Roosevelt, make no assertions of their provenance. But the objects have gotten the attention of the Navy, which earlier this year sent out new classified guidance for how to report what the military calls unexplained aerial phenomena, or unidentified flying objects. The sightings were reported to the Pentagon's ... Advanced Aerospace Threat Identification Program, which analyzed the radar data, video footage and accounts provided by senior officers from the Roosevelt. Luis Elizondo, a military intelligence official who ran the program until he resigned in 2017, called the sightings "a striking series of incidents."