DNA testing a mixed bag for immigrants
DNA testing has emerged as a powerful and sometimes controversial tool for U.S. residents seeking to help overseas relatives enter the country legally. The tests have been invaluable for thousands of citizens or permanent residents who want to sponsor relatives but lack birth certificates or other documents to prove the family relationship. But some immigration lawyers worry that U.S. authorities are increasingly requiring DNA tests even when the paperwork is in order -- adding substantial costs and delays to an arduous process. N.C. AIZENMAN in the Washington Post.