Helicopters are seen at the airport of the Futenma U.S. Mari [Getty Images]

JAPAN - SEPTEMBER 24: Helicopters are seen at the airport of the Futenma U.S. Marine Base in Futenma City, Okinawa prefecture, Japan, Sept. 22, 2005. The relocation of 8,000 U.S. Marines and dependants from Okinawa to Guam will inject as much as $15 billion into the U.S.-administered territory's economy in the next six years. (Photo by Hiroaki Maeshiro/Bloomberg via Getty Images)

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