SENIOR AIRMAN Larry Gilbert, USAF, (left), 31st Security Forces Squadron, Aviano Air Base, Italy, visually inspects an ID card of a motorist prior to granting access to area 2. The base is now operating in a Force Protection Condition in response to terrorist attacks on the World Trade Centers Twin Towers and at the Pentagon. When hijackers deliberately flew civilian airliners into the buildings, killing themselves, the passengers and thousands on the ground, on the morning of 11 September 2001. Force protection measures increased at military installations worldwide

Chicago citation style
Department of Defense. American Forces Information Service. Defense Visual Information Center. 1994. SENIOR AIRMAN Larry Gilbert, USAF, (left), 31st Security Forces Squadron, Aviano Air Base, Italy, visually inspects an ID card of a motorist prior to granting access to area 2. The base is now operating in a Force Protection Condition in response to terrorist attacks on the World Trade Centers Twin Towers and at the Pentagon. When hijackers deliberately flew civilian airliners into the buildings, killing themselves, the passengers and thousands on the ground, on the morning of 11 September 2001. Force protection measures increased at military installations worldwide. 2001-09-18. Retrieved from the Digital Public Library of America, http://catalog.archives.gov/id/6598873. (Accessed October 18, 2018.)
APA citation style
Department of Defense. American Forces Information Service. Defense Visual Information Center. 1994, (2001-09-18) SENIOR AIRMAN Larry Gilbert, USAF, (left), 31st Security Forces Squadron, Aviano Air Base, Italy, visually inspects an ID card of a motorist prior to granting access to area 2. The base is now operating in a Force Protection Condition in response to terrorist attacks on the World Trade Centers Twin Towers and at the Pentagon. When hijackers deliberately flew civilian airliners into the buildings, killing themselves, the passengers and thousands on the ground, on the morning of 11 September 2001. Force protection measures increased at military installations worldwide. Retrieved from the Digital Public Library of America, http://catalog.archives.gov/id/6598873
MLA citation style
Department of Defense. American Forces Information Service. Defense Visual Information Center. 1994. Retrieved from the Digital Public Library of America <http://catalog.archives.gov/id/6598873>.
Note: These citations are programmatically generated and may be incomplete.