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Haitians wait for the opening of the border between Jimani, Dominican Republic, and Malpasse, Haiti, on a market day, Thursday, June 18, 2015. As the Dominican Republic starts cracking down on migrants, the Dominican government is urging people to start carrying documents to prove they’re residents and avoid deportation in case immigration agents stop them. (AP Photo/Rebecca Blackwell)

Haitians wait for the opening of the border between Jimani, Dominican Republic, and Malpasse, Haiti, on a market day, Thursday, June 18, 2015. As the Dominican Republic starts cracking down on migrants, the Dominican government is urging people to start carrying documents to prove they're residents and avoid deportation in case immigration agents stop them. (AP Photo/Rebecca Blackwell)