Britain's Prime Minister Boris Johnson, center, visits the Department of Mathematics at King's Maths School, part of King's College London University, in London, Monday Jan. 27, 2020. (Daniel Leal-Olivas/Pool via AP)
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Britain's Prime Minister Boris Johnson, center, visits the Department of Mathematics at King's Maths School, part of King's College London University, in London, Monday Jan. 27, 2020. (Daniel Leal-Olivas/Pool via AP)
