Watch live: House hearing on UFO sightings

Congress is prepared to revisit the topic of UFOs once again in a Wednesday hearing that will be open to the public. More than a year has passed since U.S. House members last heard testimony about strange craft whizzing through the nation's airspace unchecked, as well as claims about the Pentagon's reticence to divulge much of what it knows. While steps have been made toward transparency, some elected leaders say progress has been stymied by the Department of Defense's reluctance to declassify material on UFOs, which the government now refers to as unidentified anomalous phenomena (UAP.) The upcoming hearing is being jointly held by Nancy Mace (R-South Carolina) and Glenn Grothman (R-Wisconsin,) who was a sponsor behind a bipartisan bill to allow commercial airline pilots to report UAP sightings to the government.