On Iran, William Hague said the second half of this year "will be very important in resolving the Iran nuclear crisis".
He said it is then that Iran will have to decide whether it really means what it says.
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South Korean officials said the hotline would help facilitate dialogue and reduce misunderstanding during times of tension.
The Gunners boss has announced he will step down at the end of the season.
Moya Greene will be pursuing ‘a range of other interests, including developing her portfolio career’.