murderous khmer rouge regime, in which millions of people died. i mean, this country is no stranger to tragedy. >> one year later, the bridge is demolished, even though it's less than two years old. there's no structural damage, but it's deemed too painful a reminder. a memorial is constructed to honor those lost. >> i think one of the key things which even the government admitted was that the ability, the crowd control ability wasn't there, that the policing was very poor, that they would need to have better systems in place. >> one of the worst things about it is that most people were young, just young kids out for an evening. and you know, people live difficult lives here, and this water festival is a time of celebration, a time to have a good time and to let go, and for it to end like that, i think that affected a lot of people. coming up -- out-of-control