<P> U.S. military installations in Puerto Rico were part of the U.S. Atlantic Command (LANTCOM after 1993 USACOM), which had authority over all U.S. military operations that took place throughout the Atlantic . Puerto Rico had been seen as crucial in supporting LANTCOM's mission until 1999, when U.S. Atlantic Command was renamed and given a new mission as United States Joint Forces Command . Puerto Rico is currently under the responsibility of United States Northern Command . </P> <P> Both the Naval Forces Caribbean (NFC) and the Fleet Air Caribbean (FAIR) were formerly based at the Roosevelt Roads Naval Station . The NFC had authority over all U.S. Naval activity in the waters of the Caribbean while FAIR had authority over all U.S. military flights and air operations over the Caribbean . With the closing of the Roosevelt Roads and Vieques Island training facilities, the U.S. Navy has basically exited from Puerto Rico, except for the ships that steam by, and the only significant military presence in the island is the U.S. Army at Ft Buchanan, the Puerto Rican Army and Air National Guards, and the U.S. Coast Guard . Protests over the noise of bombing practice forced the closure of the naval base . This resulted in a loss of 6,000 jobs and an annual decrease in local income of $300 million . </P> <P> A branch of the U.S. Army National Guard is stationed in Puerto Rico--known as the Puerto Rico Army National Guard--which performs missions equivalent to those of the Army National Guards of the different states of the United States, including ground defense, disaster relief, and control of civil unrest . The local National Guard also incorporates a branch of the U.S. Air National Guard--known as the Puerto Rico Air National Guard--which performs missions equivalent to those of the Air National Guards of each one of the U.S. states . </P> <P> At different times in the 20th century, the U.S. had about 25 military or naval installations in Puerto Rico, some very small ones, as well as large installations . The largest of these installations were the former Roosevelt Roads Naval Station in Ceiba, the Atlantic Fleet Weapons Training Facility (AFWTF) on Vieques, the National Guard training facility at Camp Santiago in Salinas, Fort Allen in Juana Diaz, the Army's Fort Buchanan in San Juan, the former U.S. Air Force Ramey Air Force Base in Aguadilla, and the Puerto Rico Air National Guard at Muñiz Air Force base in San Juan . </P>

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