Luis Elizondo is a former employee of the Office of the Under Secretary of Defence for Intelligence (OUSDI). He currently serves as Director of Global Security and Special Programs at To The Stars Academy of Arts and Science. Elizondo formerly headed the Advanced Aerospace Threat Identification Program (AATIP) until the program was defunded. AATIP was a secretive $22 million program initiated by the Defense Intelligence Agency in order to study Unidentified Aerial Phenomena (UAP), also known as UFOs. According to the Pentagon, it was cancelled in 2012. In October of 2017, Elizondo resigned from OUSDI after expressing his concern of what he called 'bureaucratic challenges and inflexible mindsets' in all levels of the Department. In his resignation letter, Elizondo wondered why 'certain individuals in the Department remain staunchly opposed to further research' of 'unusual aerial systems interfering with military weapon platforms and displaying beyond next-generation capabilities' despite numerous accounts by the United States Navy and other Services.