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Political strife in Iraq landed the country's cultural heritage sites on the list for the second consecutive time. Economic development pressures were named as endangering Machu Picchu in Peru (pictured), Old Damascus in Syria and the skyline of St. Petersburg, Russia, among others. Besides New Orleans, five U.S. sites made the list: historic Route 66, the New York State Pavilion in Queens, Tutuveni petroglyph site on Arizona's Hopi reservation, the campus of Florida Southern College in Lakeland, Fla., and San Diego's Salk Institute. The public buildings in the Main Street Modern architectural style also are included. The watch list is meant to bring attention to endangered cultural heritage sites. It was culled from more than 200 nominations and chosen by an international panel of experts in architecture, archeology, art history and preservation.