US expert: North Korea may need more atomic tests

September 9, 2011 21:01

VIENNA - North Korea has "good technical reasons" to carry out at least one more atomic test if it wants to develop a nuclear-armed missile, a prominent US scientist who has often visited the reclusive Asian state said on Friday.

The North tested nuclear devices in 2006 and 2009, but still has not shown it has a working nuclear bomb.Proliferation experts have said the country has enough fissile material for up to 10 nuclear weapons, but they don't believe it can miniaturize one to place on a missile.

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