North Korea 'capable of attaching nuclear warheads to missiles'

North Korea is now capable of attaching nuclear warheads to missiles but has not mastered hitting a target, a senior US defence official has said. Pyongyang has conducted a series of missile launches in the wake of its fourth nuclear test in January, despite international condemnation. Experts have concluded North Korea is able to make nuclear warheads small enough to arm Scud missiles, but it is unclear if they can put weapons on larger rockets which travel further and can deploy warheads from