The U.S. Military and government has spent a lot of time and money while considering the militarization of space.
Agencies periodically conduct their own special investigations and produce reports about certain allegations against their respective departments.
UFO Reporting Procedures & Regulations
Project Megiddo was a report researched and written by the United States' Federal Bureau of Investigation under Director Louis Freeh.
The following documents were obtained from the Department of the Army.
Nuclear Weapons Surety Reports
Social Security Administration Inspector General Reports
FAA Office of Aviation Research Report Index
Abu Ghraib Prison Scandal (Taguba Report)