a hearing against the former haitian president aristide has been delayed until next week. exploiting street children for political gain. police used teargas to break up supporters -- break up scuffles between supporters and opposition. algae has a remarkable properties. french designers are hoping it will help them purify water in new buildings. you could call them slime- skrapers. >> these tiny organisms could soon be turning building's green. outside and in. he wants to breed algae in tubes on the roofs inside office blocks, starting with his own grid nourished on the impurities and taps and toilets, it will turn the waste back into pure water. his project was inspired by france's new regulations that expect buildings to recycle expect buildings to recycle their own

forces back again after president aristide left.nd then we had a history of nonfunctioning governments or governments functioning to benefit themselves rather than the people and that takes a long time to recover. >> greta: do you assess that haiti can rebuild itself? and not only rebuild itself from the earthquake, but rebuild itself from decades of squalor and lack of infrastructure? do you have optimism? >> i think it can occur, a lot of progress, and help from groups and governmental, forces still there. and potential is there. look at the other side of the isle, the dominican republic. cruiseships going there, but who heard of cruiseships going to haiti. it has to be developed and fostered and work for the future. >> the real problem, a lack of durable institutions in the country and part that have has to do with interference from the outside over the years, and also, the functions of the state, and functions that would ordinarily be provided by public agencies and even by private hatian agencies being supplanted by organizatio

forces back again after president aristide left back in 2004.d a history of nonfunctioning governments or governments functioning to benefit themselves rather than the people. >> do you have a sense that haiti can rebuild itself? not only rebuild itself from the earthquake but rebuild itself from squalor and lack of infrastructure do you have a sense of optimism? >> i think it can occur. it will be a slow process it takes dedication and a lot of help from partner groups and nongovernment tal organizations and international governments u.s. forces are still there. but the potential is there. if you look at the other side of the aisle you can see what the potential could be for haiti. there are dock climbs in haiti. who ever heard of a cruise ship going to haiti. it will has to be helped. >> part of it has to do with interference from the outside over the years and also the functions of the state and functions that would ordinarily be provided by publications and even by private haitian agencies supplanted by organizations and governments on the o