N Korea preparing inter-continental ballistic missiles: Kim Jong-Un

Analysts are divided over how close Pyongyang is to realising its full nuclear ambitions, especially as it has never successfully test-fired an ICBM.

But all agree it has made enormous strides in that direction since Kim took over as leader from his father Kim Jong-Il, who died in December 2011.

A senior US defence official said last month that the North has developed the capability to pair a nuclear warhead with a missile and launch it.

But it has not mastered the ability to bring the weapon back from space and onto a target, he said.

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(Sourced from agencies, feature image courtesy:globaltechnologyblog.com)