473 Migrants Perish

Houston Chronicle: "A record 473 migrants died in the last year while crossing the U.S.-Mexico border, the most since the U.S. Border Patrol began tracking such deaths in 1999."

More: "Robin Hoover, a Church of Christ minister and president of Humane Borders, a migrant advocacy group in Tucson, estimated 300 migrants died along the Arizona border.

'It's probably even more,' he said."