A dramatic standoff between the U.S. and Colombia unfolded Sunday with Colombian President Gustavo Petro turning back two U.S. military planes that were carrying deported migrants in shackles, saying immigrants should be treated with dignity. The two countries then traded tariff threats before announcing a deal in which Colombia would begin accepting flights of deported migrants. Meanwhile, Trump has sent 1,500 active-duty troops to the U.S.-Mexico border, further militarizing the region. “We’re very, very concerned,” says immigration activist Fernando García of the El Paso, Texas-based Border Network for Human Rights, whose organization is among those providing resources like Know Your Rights training to immigrants now living under a regime of “anxiety and fear.”