The immigration officers sat in their vehicles before dawn near a two-story building. A New York subway line rumbled overhead, then an officer’s voice crackled over the radio. The immigration officers sat in their vehicles before dawn near a two-story building. A New York subway line rumbled overhead, then an officer’s voice crackled over the radio. After watching for about two hours, he said, “I think that’s Tango,” using a term for target….