The US Defense Secretary says the biggest concern for Washington is that China's air defense identification zone in the East China Sea was established suddenly and without any international consultation.
US Defense Secretary Chuck Hagel and Joint Chiefs of Staff Chairman Martin Dempsey spoke at a briefing in Washington on Wednesday.
Asked by reporters whether he thinks China should retract the move, Hagel said the type of zone itself is nothing new or unique.
He said the biggest concern for the US is that the designation was done unilaterally and so rapidly, without any international consultation. He said that it was not a wise course of action to take for any country.
Dempsey said it's not the declaration of the zone that's destabilizing. Rather, he said, it was China's assertion that it would oblige all aircraft entering the zone to report, regardless of whether they were intending to enter China's sovereign airspace. He said, that is not the international norm.
On Wednesday, US Vice President Joe Biden told Chinese President Xi Jinping in Beijing that the United States has deep concerns about the zone and does not recognize it.
Dec. 5, 2013 - Updated 00:58 UTC