For most Afghan refugees, fleeing the war-torn country is a once-in-a-lifetime experience. For Alidad, it’s a job.

He’s spent 30 years smuggling Afghans on a secret nighttime passage through the mountains of western Pakistan into Iran. Sometimes he finds out too late they can’t handle the journey.

“We go when it’s raining, when it’s snowing. People fall off the mountain, people die,” he says. “I have a lot of sad memories.”