Migrants make their way across the almost-dry riverbed of the Tijuana River on their way to the El Chaparral port of entry to the U.S. in Tijuana, Mexico, on Nov. 25.

Migrants make their way across the almost-dry riverbed of the Tijuana River on their way to the El Chaparral port of entry to the U.S. in Tijuana, Mexico, on Nov. 25.