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Dozens of people remain trapped or unaccounted for after the building collapse in central China on Friday.

Attention because the suspect wearing a black motorcycle helmet was caught, there he is, on security cameras as he made a getaway. he escaped with a pile of casino chips. president obama visited penn state university touting his green jobs initiative. the president said the goal is not to hand out money to those looking for it but to challenge america's greatest minds to come up with solutions for affordable, clean energy alternatives. hundreds of thousands of homes and businesses were destroyed in the haiti earthquake last january. nearly all of that rubble is still in haiti. imagine if you...

Dishwashers as rubble in haiti. and today's big i, a way to turn that rubble into actual building materials for haiti. and i want to introduce to you from georgia tech, reginald deroach and kimberly curtis. thank you for being here. for those of us who are not builders, i don't understand what the problem is because the rubble obviously came from building rubble obviously came building material. when a building collapses, they don't use that rubble again. you've been working on some way to reuse the rubble? >> yes, we found a way to use the rubble as part of the reconstruction efforts. >> this...

Square inch strength and more than doubled that strength. we achieved a much stronger material from a relatively weak debris material. >> you're from haiti. >> i am from haiti. >> have you gone back? >> eight times. during my fourth trip, i brought the rubble back to see if we can reuse it. >> what were your thoughts? did you have any sense it had been done before? >> the people were so concerned it was so weak, there's no way recycling it you can get strong concrete. so if you can reuse it, you can make good concrete and stronger buildings. >> how complicated is this process you guys have loo...

This is the pursuit of perfection. see what it takes at lexus.com/thehardway. remember the earthquake in ha haiti. 300,000 holmes were destroyed. 30,000 businesses were destroyed. you saw those buildings were not built to withstand an earthquake so there's just rubble all over this. just a year ago last month haiti was hit with one of the most devastating natural disasters ever recorded. that rubble is 20 million cubic yards of rubble. let me give you a sense. it's three feet by three feet by three feet. it's about the size of a dishwasher. imagine 20 million of these