A moving train fills the frame of a shaky video. A ladder looms, and hands grip the rungs. A blur of movement, and you're inside an open train car piled with coal, trees whipping by on either side.

MEXICO CITY (AP) — Mexican officials pledged Friday to set up checkpoints to “dissuade” migrants from hopping freight trains to the U.S. border. The announcement came Friday at a meeting that Mexican ...