TIJUANA, Mexico (AP) — Migrants in a caravan of Central Americans arrived in Tijuana by the hundreds Wednesday, getting their first glimpse of the robust U.S. military presence that awaits them after President Donald Trump ordered thousands of troops to the border.

Several hundred people from the caravan got off buses and made their way to a shelter on the Mexican side near the border to line up for food. Doctors checked those fighting colds and other ailments while several dozen migrants, mostly single men, spent the night at a Tijuana beach that is cut by a towering border wall of metal bars...