Is it easy for migrants to enter the U.S.? We went to the border to find out

Álvaro Enciso places crosses at sites where migrants are known to have died in the borderland, this cross represents the death of Nolberto Torres-Zayas just east of Arivaca, Arizona on Wednesday, March 27, 2024. Torres-Zayas died of hyperthermia in 2009, not far from a Humane Borders water cache that had been vandalized and drained. (Ash Ponders for NPR)

NOGALES, Ariz. – It's easy to walk south from the U.S. into Mexico. What's hard is going the other way.

A team of NPR journalists experienced that for ourselves, on a bright day in March when we passed easily through a legal port of entry that separates Nogales, Arizona, from Nogales, Sonora.