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LONDON, ENGLAND - JUNE 30:  Former London Mayor and Conservative MP Boris Johnson speaks as he rules himself out of becoming the next Conservative party leader at St Ermin's Hotel on June 30, 2016 in London, England. Nominations for MP's to declare their intention to run for the Conservative Party Leadership and therefore British Prime Minister will close by noon today. The current Prime Minister and party leader, David Cameron, announced his resignation the day after the UK voted to leave the European Union.  (Photo by Dan Kitwood/Getty Images)
LONDON, ENGLAND - JUNE 30:  Former London Mayor and Conservative MP Boris Johnson speaks as he rules himself out of becoming the next Conservative party leader at St Ermin's Hotel on June 30, 2016 in London, England. Nominations for MP's to declare their intention to run for the Conservative Party Leadership and therefore British Prime Minister will close by noon today. The current Prime Minister and party leader, David Cameron, announced his resignation the day after the UK voted to leave the European Union.  (Photo by Dan Kitwood/Getty Images)

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    Boris Johnson becomes British Foreign Secretary

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Boris Johnson becomes British Foreign Secretary

Controversial politician Boris Johnson has been appointed Foreign Secretary by new British Prime Minister Theresa May. CNN's Nic Robertson reports.

Boris Johnson becomes British Foreign Secretary

Controversial politician Boris Johnson has been appointed Foreign Secretary by new British Prime Minister Theresa May. CNN's Nic Robertson reports.