In an action seeking a declaratory judgment that the continued detention of class members pursuant to 8 U.S.C. section 1226(c) and without bond hearings violates the INA and Due Process, judgment of the district court denying class certification and dismissing action is reversed where the court erred in finding that 8 U.S.C. section 1252(f)(1) deprived it of subject matter jurisdiction over plaintiffs' action.