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HANNOVER, GERMANY - APRIL 23: Protesters attend a protest against the TTIP and CETA free trade agreements march on the eve of a visit by U.S. President Barack Obama on April 23, 2016 in Hannover, Germany. (Photo by Mehmet Kaman/Anadolu Agency/Getty Images)

HANNOVER, GERMANY - APRIL 23: Protesters attend a protest against the TTIP and CETA free trade agreements march on the eve of a visit by U.S. President Barack Obama on April 23, 2016 in Hannover, Germany.  (Photo by Mehmet Kaman/Anadolu Agency/Getty Images)