AlHijjah 13, 1432, Nov 9, 2011, SPA - A senior U.S. Navy commander said Wednesday he worries much more about North Korea than about other Asian countries, including rising military power of China. Vice Admiral Scott Swift, who took over as commander of the 7th Fleet in September, said that while the U.S. military has an "open and robust" relationship with China, he spends a lot of time thinking about North Korea because of its "unpredictability." "Insight to what their thoughts may be is very limited. It's a closed society," Swift said. That's "a concern to me because I could not guess where any decision may be going with respect to North Korea," said Swift, who said he wanted good relationships with his counterparts in Asia so that he could anticipate what they might do instead of react to them, according to a report of the Associated Press.