In 1993, Steven M. Greer founded the Disclosure Project to promote the concept of disclosure. Greer spearheaded the concept of "disclosure" and attempted to get access to mainstream media for over a decade.
In May 2001, Greer held a press conference at the National Press Club in D.C that featured "20 retired Air Force, Federal Aviation Administration and intelligence officers" who demanded that Congress begin hearings on "secret U.S. involvement with UFOs and extraterrestrials" and was described by an attending BBC reporter as "the strangest ever news conference hosted by Washington's August National Press Club." Greer convened the conference with more than 100 other contactees offering testimony. Among the contactees were "...about 20 former government workers, many of them military and security officials, who stepped forward...and called for congressional hearings about such sightings." Such arguments were met with by derision by skeptics and spokespeople for the U. S. Air Force who maintain that there is no convincing evidence for the speculation that UFOs are alien spacecraft.
In 2007, the Paradigm Research Group, an independent ufologist group, held a news conference to demand disclosure. Speaker Stephen Bassett noted the long history of attempts at disclosure, and claimed that alien technologies could be beneficial for Earth.
In 2010, the film The Day Before Disclosure was released for free by New Paradigm Films.
From April 29 to May 3 2013, the Paradigm Research Group held the "Citizen Hearing on Disclosure" at the National Press Club. The group paid former U.S. Senator Mike Gravel and former Representatives Carolyn Cheeks Kilpatrick, Roscoe Bartlett, Merrill Cook, Darlene Hooley, and Lynn Woolsey $20,000 each.  The conference, and a documentary (working title: Truth Embargo) summarizing its findings, were intended to compel Congress, United Nations or both to open an investigation. Kilpatrick complained about the lack of transparency at the hearing.
- Richard M. Dolan, Bryce Zabel (2012). A.D. After Disclosure: When the Government Finally Reveals the Truth About Alien Contact. New Page Books. ISBN 1601632223.
- Robert Powell (2012). UFOs and Government: A Historical Inquiry. Anomalist Books, LLC. ISBN 1933665580.
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- "They're Here; UFO watchers to reveal proof that aliens have visited Earth". The Daily Record. May 9, 2001.
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- "Group Calls for Disclosure of UFO Info". ABC News. May 10, 2001.
- Kehnemui, Sharon (May 10, 2001). "Men in Suits See Aliens as Part of Solution, Not Problem". Fox News. Retrieved 2007-05-10.
- McCullagh, Declan (May 10, 2001). "Ooo-WEE-ooo Fans Come to D.C.". Wired News. Retrieved 2007-05-10.
- Milbank, Dana (September 18, 2007). "There's the Red Vote, the Blue Vote . . . and the Little Green Vote". Washington Post.
- Schultz, Marisa (April 29, 2013). "Ex-Rep. Kilpatrick 'waiting to hear' evidence of space aliens". Detroit News.
- Butler, Kristen (April 29, 2013). "Former members of Congress attend 'hearing' on space aliens". UPI.
- Roberts, Dan (29 April 2013). "UFO conspiracy hearing boosted by former congressmen and senator". The Guardian. Retrieved 1 May 2013.