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TOPSHOT - UN Secretary general Ban Ki-moon (L) and Chilean President Michelle Bachelet (C) look at Colombian President Juan Manuel Santos at the end of the signing ceremony of a historic peace agreement between the Colombian government and the Revolutionary Armed Forces of Colombia (FARC), in Cartagena, Colombia, on September 26, 2016. The Colombian government and the leftist FARC rebel force signed a historic peace accord to end a half-century conflict that has killed hundreds of thousands of people. Santos and 'Timochenko' Jimenez, signed the deal at a ceremony in the Caribbean city of Cartagena, prompting loud cheers from the crowd which included numerous international dignitaries. / AFP / Luis ACOSTA (Photo credit should read LUIS ACOSTA/AFP/Getty Images)

TOPSHOT - UN Secretary general Ban Ki-moon (L) and Chilean President Michelle Bachelet (C) look at Colombian President Juan Manuel Santos at the end of the signing ceremony of a historic peace agreement between the Colombian government and the Revolutionary Armed Forces of Colombia (FARC), in Cartagena, Colombia, on September 26, 2016.
The Colombian government and the leftist FARC rebel force signed a historic peace accord to end a half-century conflict that has killed hundreds of thousands of people. Santos and 'Timochenko' Jimenez, signed the deal at a ceremony in the Caribbean city of Cartagena, prompting loud cheers from the crowd which included numerous international dignitaries.
 / AFP / Luis ACOSTA        (Photo credit should read LUIS ACOSTA/AFP/Getty Images)