The migrants Trump forced Mexico to stop: Ada Trillo's best photograph

Trump had threatened Mexico with tariffs if it let in this caravan from Honduras. Two hours after crossing this river, many were teargassed then deported'

I had been following a migrant caravan north from San Pedro Sula, Honduras, for around 10 days. It was 23 January 2020, and this was the moment the group crossed the Suchiate river, which divides Guatemala from Mexico.

The Mexican authorities had deployed the national guard to stop the caravan entering their country because Trump had threatened to increase tariffs on Mexican goods coming into the United States if they let migrants in. Previously, migrants had been allowed to traverse the length of Mexico with no problem.