US soldier believed held in North Korea after crossing border

Seoul (AFP) - A US soldier is believed to have been detained by North Korea after crossing the heavily fortified border -- an incident likely to further aggravate Washington's troubled relations with the nuclear-armed state. Hours later, North Korea fired two short-range ballistic missiles into the sea, according to the South Korean military -- an apparent response to the first visit by an American nuclear-armed submarine to a South Korean port in decades. The events underscored the diplomatic tightrope being walked by Seoul and Washington in the face of an increasingly assertive Pyongyang. Th...