PHOTOS: Migrants trek toward US border

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A migrant caravan, which has grown into the thousands, walks into the interior of Mexico after crossing the Guatemalan border on October 21, 2018 near Ciudad Hidalgo, Mexico The caravan of Central Americans plans to eventually reach the United States. U.S. President Donald Trump has threatened to cancel the recent trade deal with Mexico and withhold aid to Central American countries if the caravan isn't stopped before reaching the U.S.