Troops fire gas as migrants try to storm into Mexico

Hundreds of Central Americans from a new migrant caravan tried to force their way into Mexico Monday by crossing the river that divides the country from Guatemala, prompting the National Guard to fire tear gas.The Central Americans, from the so-called "2020 Caravan" of around 3,500 undocumented migrants, gathered on the Guatemalan side of the Suchiate River at dawn, demanding migration authorities let them continue their journey to the United States.