"Excessive secrecy has led to grave misdeeds against loyal civil servants, military personnel and the public — all to hide the fact that we are not alone in the cosmos."

On Wednesday, a new slate of witnesses provided fresh testimony to Congress on UFO sightings and what the government may (or may not) know about them.

More than a year has passed since U.S. House members last heard testimony about UFOs and what the Department of Defense may be concealing about them.