There is new evidence that North Korea may be preparing to for an underground test of nuclear bomb, U.S. officials tell ABC News. "It is the view of the intelligence community that a test is real possibility," says a senior State Department official. A senior military official tells ABC News that a U.S. intelligence agency has recently observed "suspicious vehicle movement" at a suspected North Korean test site. The activity includes the unloading of large reels of cable outside an underground facility called Pungyee-yok in northeast North Korea. Cables can be used in nuclear testing to connect an underground test...