Ukraine war: Estonia's weekend warriors prepare for war with Russia
Last month, the head of the British Army, General Sir Patrick Sanders, mooted the idea of a pre-war, part-time citizen's army to defend the UK. Such an army is already in place in Estonia. Deborah Haynes watched them train on the freezing border with Russia.
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It's a question many European countries are asking: What do they need to do to counter the growing threat from Russia following Moscow's invasion of Ukraine?