Rosa Hidalia Palacios fled El Salvador in April. She crossed into Mexico from Guatemala without a hitch, riding on a little raft that ferries people and goods back and forth. A few hundred yards down the Suchiate River from the rafting route, Mexican immigration enforcement agents watched idly from the official border crossing.
Palacios hasn't made it much farther than the border, as dozens of migration checkpoints cover all roads leading north. She is stuck in a nearby city, Tapachula, Mexico, waiting in line outside the little office of the Mexican Commission for Refugee Aid.