The Pentagon is forming a new task force to investigate UFOs that have been observed by US military aircraft, according to two defense officials. Deputy Secretary of Defense David Norquist will help oversee the task force. Members of Congress and Pentagon officials have long expressed concerns about the appearance of the unidentified aircraft that have flown over US military bases. There is no consensus on their origin with some believing they may be drones potentially operated by earthly adversaries seeking to gather intelligence rather than extraterrestrials. The Senate Intelligence Committee voted in June to have the Pentagon and intelligence community provide a public analysis of the encounters, following the official Pentagon release of three short videos showing US aircraft encountering these phenomena. "We have things flying over our military bases and places where we are conducting military exercises, and we don't know what it is and it isn't ours, so that's a legitimate question to ask," the chairman of that committee, Sen. Marco Rubio, [said]. The videos released by the Pentagon appear to show unidentified flying objects rapidly moving while recorded by infrared cameras. The Pentagon had previously studied recordings of aerial encounters with unknown objects as part of a since-shuttered classified program that was launched at the behest of former Sen. Harry Reid of Nevada. That program was launched in 2007 and ended in 2012, according to the Pentagon.