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President Trump has been determined that the migrant caravan not be allowed to enter the US. Now his administration has extended the deployment of more than 5,000 troops on the US-Mexico border to the end of January, 2019. Many of the migrants are now waiting in the Mexican border town of Tijuana for a chance to seek asylum in the US. We find out what life is like for them.

Also: A group of gay and transgender migrants find safety in numbers as they wait to seek asylum in the US; we find out how the US government is using biometric data to gather intelligence on members of the migrant caravan; we hear the story behind the now-iconic photo of a mother and her two daughters running away from tear gas on the US-Mexico border; also we learn about the tiny American town where tear gas is big business; Plus, Pulitzer Prize winning journalist Sonia Nazario shares her thoughts about possible solutions to the Central American migrant crisis.

(Central American migrants rest after being relocated to a new temporary shelter in east Tijuana, Mexico. Credit: Guillermo Arias/Getty Images)