FILE - In this Aug. 10, 2006, file photo, the sign used as the backdrop for press briefings at the U.S. Department of State is seen before a news conference at the State Department in Washington. A Christian pastor from California has been freed from China after nearly 20 years behind bars and is back home in the U.S., the State Department said. Two groups say the 68-year-old David Lin was detained after he entered China in 2006, convicted of contract fraud and sentenced to life in prison. (AP Photo/Charles Dharapak, File)