The U.S. Customs officer eyed Sang's well-traveled South Korean passport. "What is your purpose in the United States?" she asked. Sang said he was "on holiday" and would be going back to Korea in two weeks, yet agents still pulled him aside from the rest of the arrivals at Chicago's O'Hare International Airport last November. Bogged down with suitcases and jet lag, they filed into two lines, one for citizens and residents, one for foreigners — the chasm between "Welcome home" and "How long are you... More >>>