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By contrast, North Korea has defied all international sanctions to build up a formidable arsenal of nuclear warheads and intercontinental ballistic missiles, enough to make any potential attacker think twice.

It was the first time he decided to participate in the protests, and he didn’t think twice when he grabbed the Taegeukgi.

John and Kerri Davies, owners of J&K Travel, said they did not have to think twice about offering free transport to those who found themselves stranded - as public transport was overwhelmed.

The weather service expects to issue heat advisories, warning people to think twice if considering strenuous midday activity such as hiking.

"And you need more men like James who wouldn't think twice about taking women on, because a lot of men aren't like that and still think it's a man's job."