The Nobel Prize laureates for physics 2018 shown on the screen from left, Arthur Ashkin of the United States, Gerard Mourou of France and Donna Strickland of Canada during the announcement at the Royal Swedish Academy of Sciences in Stockholm, Sweden, Tuesday Oct. 2, 2018. The three scientists from the United States, France and Canada have been awarded the Nobel Prize in physics for advances in laser physics. (Hanna Franzen/TT via AP)
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