On a recent Friday night in Phoenix, an unmarked white Department of Homeland Security bus pulls up to a curb near the Greyhound bus station.
The door swings open and 15 young men and women from India step off. In the scorching summer heat, they climb into waiting cars and taxis, cramming as many passengers inside as possible before they are driven off into the night.
A half-hour later, a second DHS bus pulls up to the same spot. Twenty Indians climb into cars and taxis, and like the first group, speed off.
This scene is repeated almost nightly at the Greyhound bus station on Buckeye Road and 24th Street near Phoenix Sky Harbor International Airport.