Schoolgirls in tradi...: Schoolgirls in traditional `Ao Dai` dresses and conical hats cycle past Hanoi's Opera House. Every Monday and Saturday, girls dressed in the graceful Ao Dai can be seen making their way through the busy streets, chatting together as they ride. Ao Dai is a symbol close to the hearts of the Vietnamese and is enjoying a revival among Vietnamese people overseas. /KTS