North Korea spent the whole of winter enriching uranium, though the aim remains unclear.The country's main nuclear complex showed continued activity, according to a US monitor.Satellite imagery of its uranium enrichment facility showed movement of specialised vehicles and equipment nearby in January and February this year.This suggests the Uranium Enrichment Plant (UEP) has continued operations, reports Yonhap.However, experts analysing satellite imagery said there were no signs of activity at nuclear reactors.The US monitor website said: "In contrast to the reactor area of the complex, the UEP exhibited continual signs of operation throughout the winter months."Images showed "uniquely configured, specialised railcars" arriving and.
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