ECUADOR-COLOMBIA-VENEZUELA-CRISIS-MIGRATION

Venezuelan migrants waiting outside the Ecuadorean migration office at the Rumichaca international bridge in Tulcan, Ecuador, after crossing from Ipiales in Colombia, receive food from a group of Colombians who cross the border to help them, on August 20, 2018. - Bogota said on August 17 it was "worried" that tightened Ecuadorean entry requirements for Venezuelans fleeing an economic and political crisis would leave thousands stranded in Colombia. Ecuador announced on Thursday that Venezuelans entering the country would need to show passports from Saturday onwards, a document many are not carrying. And Peru followed suit on Friday, announcing an identical measure due to begin a week later. (Photo by Luis ROBAYO / AFP) (Photo credit should read LUIS ROBAYO/AFP via Getty Images)