i'm here at jefferson parish at the exact spot that was submerged back in august 2005 and i'm 6 foot 2 and if i stretch my hand up to this height... triple that. that's how high some of the flood waters were in some neighborhoods here in this area. now while the waters are long gone, the issues are not. techknow's marita davison has spent a week here in new orleans - now marita, you've been piecing together what went wrong from a science and engineering perspective. >> and phil you said it, this community was devastated when hurricane katrina hit, now in the 10 years since, scientists have made significant improvements to the system, these are coming together to form multiple lines of defense that reduce the risks from another katrina-like storm. let's take a look. >> this area has been vulnerable to storms like katrina since 1200 years ago. >> katrina was really a wake up call to the corp of engineers. >> what katrina did is... it brought the eye to what's happening when you destroy things...if we don't repair things that protect us, in 80 years the city of new orleans will be under

. >> i'm from louisiana, i'm coming from jefferson parish. i'm on a parole violation. was just at the wrong place at the wrong time. it happens. >> in the days following katrina, 6,000 inmates were trapped in orleans parish prison. wilford martin was one of them. >> when the levees broke is when we noticed that whole businesses outside of the very prison were under water. no sergeants were around, no guards. we don't know where they were at. we were just stuck on the fourth floor. that's when we realized that we were stuck here. it seemed like life or death. >> five days after the levees broke, they were finally rescued by warden cain and his tactical team. >> we came the first night to get the first 950 prisoners, but the water was coming up. we barely got through all of this, all of this water. and we got down here to this underpass and right here was a man laying dead. we put the scaffold right here and it went down from this side. you can see the rope's still there and we would lower it, inmates would climb down that scaffold and we would line them up on this road,

consider jefferson parish, louisiana, where african-american students accounted for 80% of students who were arrested and referred to the police. although they make up only 41.5% of the students in the school. and consider delaware, where african-american students accounted for 67% of students refer to the police, although they made up only 32% of students in the school system. so when we think about whether police are in schools for surveillance or whether they are in school to police, to improve the relationships between youth and police officers, we have to consider that police are always police. police dressed like a police. they talk like police. but if you like police and to investigate like police and the arrest like police, even when they are in school. and students come to believe that their interaction with the police in schools will be representative of their interactions with police officers on the street. and, indeed, in numerous accounts of police youth interactions, we have black boys who complain about the sheer number of police officers in their neighborhoods. they comp

consider jefferson parish louisiana, where african-american students accounted for 80% of students who were arrested and referred to the police. although they made up only 41.5% of the students in the school. where delaware, where african-american students accounted for 67% of students referred to the police although they made up only 32% of students in the school system. so when we think about whether police are in schools for surveillance or whether in schools to police -- to improve relationships between youth and police officers we have to consider that police are always police. police dress like police. they talk like police. they interview like police and they investigate like police and they arrest like police even when they are in school and students come to believe their interactions with the police and schools will be representative of their interactions with police officers on the street. and numerous accounts of police youth, interactions we have black boys who complain about the sheer number of police officers in their neighborhoods. they complain about being stopped by po