PHOENIX, AZ - JUNE 18: Republican presidential candidate Donald Trump waves to the crowd of supporters during a campaign rally on June 18, 2016 in Phoenix, Arizona. Trump returned to Arizona for the fourth time since starting his presidential campaign a year ago. (Photo by Ralph Freso/Getty Images)
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403785 04: National Liberation Army (ELN) soldiers stand in formation at one of their camps near the front line April 11, 2002 in the Arauca province of Colombia. The ELN guerrilla army said it was liberating 11 civilians, including politicians and a priest, as a sign of good faith to continue peace talks with the Colombian government. The freed hostages delivered a message from the ELN that demanded that the Colombian government reject U.S. assistance to protect a critical oil pipeline. (Photo by Carlos Villalon/Getty Images)
