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British Prime Minster Boris Johnson leaves 10 Downing Street for Prime Minister's Questions, in London, Britain, Feb. 26, 2020. Johnson on Wednesday announced a major review of the country's post-Brexit approach to defense, security and international development, which will define and overhaul Britain's place in the world. Described as the largest review of Britain's foreign, defense, security and development policy since the end of the Cold War, it will cover all aspects of Britain's place in the world, from diplomatic service and the country's approach to development to the capabilities of its armed forces and security agencies. (Photo by Tim Ireland/Xinhua)