The U.S. government has not been able to give a definitive explanation for the aerial phenomena discovered by military pilots, but has found no evidence that they are related to aliens, information investigating the issue. According to two officials who were briefed on the report.

A report, due out later this month, examines several unexplained sightings in recent years, shot in a pilot’s video yelling at a pilot flying in front of him. The two, who were briefed on the report, said no evidence of extraterrestrial links had been found and that the pilots did not rule out the possibility of new technologies developed by other countries. One official said there was no indication that the unexplained phenomenon was due to a secret US program.

The two officials were not authorized to discuss the information publicly and spoke on condition of anonymity. The report’s findings were first released by the New York Times on Thursday.

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