In California, immigration officials at San Francisco International Airport have detained a South Korean-born researcher and longtime permanent resident for the past week without explanation — and without access to a lawyer. Tae Heung “Will” Kim moved to the U.S. when he was just 5 years old. He’s a doctoral candidate at Texas A&M University, where he’s working on a vaccine to prevent Lyme disease. He was detained on July 21 after returning from a two-week trip to South Korea to attend his brother’s wedding.