Friday, November 29, 2013
The vast zone, announced last week, covers territory claimed by China, Japan, Taiwan and South Korea.
China has said all planes transiting the zone must file flight plans and identify themselves, or face "defensive emergency measures".
But Japan, South Korea and the US have all since flown military aircraft through the area.
The new dispute in an already tense region has raised concerns it could escalate into an unplanned military incident.
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Comment: We'll be flying commercial from Okinawa to mainland Japan soon. I hope the Chinese don't decide on a whim just to redraw that map to include all of Okinawa's airspace too before we go...