Schoolgirls in tradi...: Schoolgirls in traditional `Ao Dai` dresses and conical hats sit by a tree in Sword Lake ('Hoan Kiem'). The traditional long white dresses are the formal uniform of many high school girls in Vietnam. With their softly flowing fabric covering the whole body, the dresses flatter their slender figures, and symbolise the purity of young Vietnamese girls. /KTS