U.S. Special Representative on North Korea Stephen Biegun on Friday said Washington would keep the door open for dialogue with Pyongyang. The comments by the U.S.'s top diplomat on North Korean issues -- in Seoul until Saturday -- came just a day after the DPRK conducted its second missile test in a week. Speaking during a meeting with foreign minister Kang Kyung-wha, Biegun said he empathized with Seoul's concerns that that test would serve to undermine efforts to improve "inter-Korean relations and alleviate military tensions." The U.S. “still holds the door open for North Korea to