An aerial view of the Futenma U.S. Marine Base in Futenma Ci [Getty Images]

JAPAN - SEPTEMBER 23: An aerial view of the Futenma U.S. Marine Base in Futenma City, Okinawa prefecture, Japan, July 27, 2006. The Marines plan to move 17,000 personnel and dependents to Guam from Okinawa, Japan, beginning in 2012, boosting the island's population by 10 percent. House prices have risen 70 percent since 2003 on expectations of increased demand. (Photo by Hiroaki Maeshiro/Bloomberg via Getty Images)

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