Today, transnational security threats such as terrorism, nuclear proliferation, pandemics, and climate change can cross borders as freely as a storm.

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Liberal Democrat MP Sir Menzies Campbell, who is chairing the cross-party commission looking into the nuclear issue, said the report was ill-timed.

BBC: Replacing Trident makes no sense, Centreforum argues

And a lot of the threats that we're going to be facing, whether it's international terrorism, cyber terrorism, nuclear proliferation, pandemic, climate change -- a lot of these issues, they cross borders.

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