Although Koreans immigrated to the United States in the early 20th century and again shortly after the Korean War, the largest wave of Korean immigrants didn't arrive here until after the Immigration Act of 1965. Korean Americans are the fourth-largest Asian group in the United States; 33 percent live in California. "Korean Americans" focuses on this important group, its history, culture, and contributions, and includes profiles of such notables as Jay Kim, who, in 1993, became the first Korean American elected to Congress, and ABC News anchor, Ju Ju Chang.