uma. uma: it's a very delicate operation there. we keep hearing the word dispersing. what is this and how effective is it? >> reporter: you're going to hear the word dispersent is lot in the coming weeks because it is a fight be methods and what it does, it disperses the i. think of it as you will like joy dishwashing liquid. you when you have a sink that has oil in it, you put joy on it and it breaks up the oil, that's what it does, it uses the chemical to break up the oil in smaller pieces so it can be degraded by natural bacteria. the other key in that is they're sticking this dispersant in a pipe, as it goes out of the pipe, they're going after it. they've had success with that. it's being used by planes, and right now, it's been at least mildly effective. uma: let's hope it has an impact overall and makes a big difference in the end. trace gallagher on the front lines, thank you very much. bill: we're going to talk to head of bp next hour, top of the next hour, a lot of the same quest

uma: have a great day. jon: good monday morning to you, i'm jon soth. jane: i'm jane skinner, bp will pay for the cleanup cost for the oil spill in the gulf. who is to blame for the accident that caused this developing disaster? the first place? jon: in the middle box, mahmoud ahmadinejad locked in a nuclear showdown with the u.s. and other world powers and right now he's gearing up to speaat the united nations, you will a-- he will address the topic of nukes. jane: an unprecedented rain event, killer thunderstorms giving way to major fears of flooding. in tennessee, the cumberland river is about to crest. take look at our newsroom, it's coming in there, from across the country, around the world. you know we'll bring all the details to you as soon as we get them. jon: first into the investigation into the attempted times square car bombing, police questioning the owner of the suv used in that failed attack, this as surveillance video now released shows the tens moments after street vendors alerted police to the suspicious parked vehicle. moments later t

celebrity uma thurman stalked by an obsessed man from maryland and howard county psychologist dr.orism. >> reporter: this stalking victim testimony led a jury to convict her former patient on 20 criminal charges related to stalking. >> she was willing to do whatever she could to destroy me personally and professionally. >> reporter: the or debegan when she tried to refer the patient to another doctor threats followed. >> comments like, it would be easier for you to stay in this relationship with me and pretend you like me rather than for it to get worse. >> reporter: it did get worse constant harassing e-mails, phone calls, text messages and even sending this photo holding a real gun to her own head. did you feel physically threatened? did you feel like your life was in danger. >> i did. i was constantly in fear whether or not the person would show up and do harm to me or herself or anybody else in the area. >> reporter: the courts granted jerchgins the poz order but the patient still hacked into jenkins e-mail and followed her to a local restaurant and spread vicious rumors about