U.S. agents unlawfully detained an Afghan family of five at Los Angeles International Airport and have been holding them for several days in California, according to legal papers filed in federal court in California by human rights lawyers. The father, mother and three small children were granted Special Immigrant Visas because family members risked their lives to defend the U.S. government overseas, said the filing from lawyers with the International Refugee Assistance Project, a legal aid group for refugees and displaced persons.