** FILE ** Glyn Davies, U.S. ambassador to the International Atomic Energy Agency, was named on Wednesday, Oct. 19, 2011, as the new U.S. envoy on North Korea. (AP Photo/Ronald Zak, File)

Photo by: Ronald Zak

** FILE ** Glyn Davies, U.S. ambassador to the International Atomic Energy Agency, was named on Wednesday, Oct. 19, 2011, as the new U.S. envoy on North Korea. (AP Photo/Ronald Zak, File)