AATIP (Advanced Aerospace Threat Identification Program) — also known as AAWSAP (Advanced Aerospace Weapon Systems Applications Program) — was a classified US government program that investigated UAP from 2007 through 2012. Its public disclosure on December 16, 2017 is widely considered the catalytic event that began the modern era of government UAP transparency. ORIGIN: Initiated by Senate Majority Leader Harry Reid (D-NV) at the urging of his friend and Nevada billionaire Robert Bigelow. Senators Ted Stevens (R-AK) and Daniel Inouye (D-HI) — who controlled the Defense Appropriations Subcommittee — co-sponsored the funding. The program began in the Defense Intelligence Agency (DIA) and was budgeted $22 million over five years. CONTRACT: Awarded September 16, 2008 to Bigelow Aerospace Advanced Space Studies (BAASS). Bigelow retrofitted his North Las Vegas plant for UAP materials analysis and storage. BAASS also investigated Skinwalker Ranch as part of its contract — directly connecting AATIP to the paranormal phenomena at that site, and to James Lacatski’s 2007 visit where he allegedly witnessed a floating object that convinced him of the program’s necessity. DIRECTOR: Luis Elizondo — career military intelligence officer. He ran the program informally from approximately 2010 until his resignation on October 4, 2017 — citing excessive secrecy and bureaucratic resistance. Three videos (Tic Tac, Gimbal, GoFast) were declassified at his direction through the Defense Office of Prepublication and Security Review. DISCLOSURE: December 16, 2017 — coordinated publication by The New York Times (Helene Cooper, Ralph Blumenthal, Leslie Kean), Politico, and Washington Post. The NYT story included the first public release of the Nimitz Tic Tac video. Pentagon confirmed the program’s existence. Elizondo had already joined TTSA with Christopher Mellon. Pentagon controversy: DOD spokesperson stated Elizondo “had no responsibilities with regard to AATIP” — directly contradicting TTSA’s account. SIGNIFICANCE: AATIP directly triggered UAPTF (2020), congressional hearings (2023), AARO (2022), the UAP Disclosure Act, and the current disclosure era. Even with its funding officially ended in 2012, Elizondo maintained the investigation continued with Navy and CIA support until his resignation.