Wall street Journal
A new U.S. military intelligence assessment says for the first time that North Korea may have developed a nuclear device small enough to mount on a ballistic missile, but said such a weapon's "reliability would be low."

In an assessment by the Defense Intelligence Agency, a branch of the Pentagon, analysts appeared to upgrade U.S. estimates of North Korea's nuclear-weapons abilities, according to a portion of the report disclosed by a lawmaker at a House hearing on Thursday.

There was disagreement in Washington over the extent of North Korea's capabilities, with Obama administration officials and the Pentagon press office saying there isn't evidence that the country could use such a weapon.