Some US Border Patrol agents believe the threat from ISIS on the US border is very real. But some southwestern politicians call the contention little more than anti-Islamic fear-mongering, saying the evidence doesn't support claims of ISIS infiltration.
The US-Mexico border is an unforgiving place, where weather can shift quickly from blazing heat to freezing nights. And even those trying to cross into the US illegally will call 911 when they are scared, suffering and need help.
There was another exodus from Central America. It happened in the 1980s, when almost one million Guatemalans and Salvadorans fled to the US to escape civil war. And a group of American activists and religious leaders took big risks to help them stay.
Twenty years after the massacre at Srebrenica, the US aims to deport Bosnian immigrants suspected of involvement. But one Bosnian Serb facing deportation says he's been unfairly labeled a war criminal.
Many Mexican families are tuned into news from Washington and whether Congress will change immigration laws. From the public radio collaboration Fronteras Desk, Jude Joffe-Block reports from Mexico about families hoping for long-awaited reunions.
The boarder's a no man's land patrolled by border guards. But on weekends, it becomes a place where families separated by immigration status can come to spend time together, albeit on opposite sides of a fence.