Because of a long-running border dispute with Thailand, Cambodian soldiers guard the ruins of the Preah Vihear temple complex, which was declared a UNESCO World Heritage site in 2008.(Masuru Goto)
Archaeologist Pheng Sam Oeun was chatting with a park ranger at Preah Vihear when the artillery barrage started. It was 6:15 p.m. on February 4, 2011, and he had just finished his workday at the administrative center at the base of the mountain where the 1,100-year-old Khmer temple complex stands.