Handout photo of cloaking device using four lenses developed by University of Rochester physics professor Howell and graduate student Choi is demonstrated in Rochester

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A cloaking device using four lenses developed by University of Rochester physics professor John Howell and graduate student Joseph Choi is demonstrated in Rochester, New York in this September 11, 2014 University of Rochester.REUTERS/J. Adam Fenster/University of Rochester/Handout via Reuters