About 3,000 migrants travel in caravans to US border, undeterred by crackdown

Migrants of different nationalities walk along a road in a caravan toward the U.S Tuesday in Tapachula, Chiapas state, Mexico. (REUTERS/Jose Torres)

About 3,000 people carrying bags, water and small children trod through intense heat along a highway in southern Mexico on Tuesday, traveling in two groups aiming to reach the U.S. border.