The US Navy deployed one of its most advanced aircraft carriers to Japan to strengthen ties between Washington and Tokyo.
The USS Ronald Reagan, carrying a crew of 5,000 sailors and around 80 aircraft, docked at Yokosuka naval base on Thursday.
The nuclear-powered Reagan, which is equipped with the latest targeting and defense radars, integrated weapons systems and command and communications technology, marks an upgrade from the ship it is replacing, the USS George Washington.
