ADVANCE FOR USE MONDAY, AUG. 6, 2012 AND THEREAFTER - In this Tuesday, July 10, 2012 photo, archaeologists stand next to ruins which scholars think may be from the legendary Arab Christian city of Hira, just a few hundred yards (meters) from the runway of the airport in the holy Shiite Muslim city of Najaf, about 160 kilometers (100 miles) south of Baghdad. The site's discovery in 2007 and its subsequent neglect are symbolic of a Christianity that has long enriched this country, and is now in decline as hundreds of thousands have fled the violence that followed the U.S.-led invasion in 2003. (AP Photo/Alaa al-Marjani)