There has been a lot of huffing and puffing out of Washington and Tokyo in the wake of China's declaration of an air defense identification zone (ADIZ) over the East China Sea.
U.S. Secretary of State John Kerry said that "the U.S. does not support efforts by any state to apply procedures of an air defense identification zone to foreign aircraft not intending to enter its national airspace. We urge China not to implement its threat to take action against aircraft that do not identify themselves or obey orders from Beijing."
U.S. Defense Secretary Chuck Hagel was more blunt. He said the imposition of the zone was a "destabilizing attempt to alter the status quo in the region."