Migrant caravan groups arrive by hundreds at US border

Central American migrants line up for a meal at a shelter in Tijuana, Mexico, Wednesday, Nov. 14, 2018. Migrants in a caravan of Central Americans scrambled to reach the U.S. border, catching rides on buses and trucks for hundreds of miles in the last leg of their journey Wednesday as the first sizable groups began arriving in the border city of Tijuana. (AP Photo/Gregory Bull)

TIJUANA, Mexico — 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.