Workers clean bricks...: Workers clean bricks in the ancient citadel of Thang Long on Hanoi Jan 31, 2004. This Forbidden Citadel was used by many Vietnam's former dynasties from 11th to 18th centuries. It was uncoverd when a new National Assembly House was built in Hanoi in 2003 and has become a priceless archeological relic in Hanoi. KTS photo/ Nguyen Hong Sam /KTS