The Pentagon’s UFO office has received more than 700 reports, a newly declassified assessment reveals. It’s a dramatic increase in witness sightings and accounts that adds to a growing list and comes as former Defense Department officials claim the U.

A new Pentagon report on unidentified anomalous phenomena, also known as UFOs, attributes most sightings worldwide to ordinary objects like birds and weather balloons, but officials say they’re still willing to sit down with members of Congress who say they’re hiding the truth.