fallen fireman christopher santorez's mother and father saluted the president. >> he acted as the commandern chief and i'm very proud to be an american, and he did the right thing. >> other family members felt the same about bin laden's death and the president's visit. >> it brings up everything, all the images, the pictures, the reliving for my family. we never really had any closure. >> reporter: now mary says almost 10 years after her brother, peter, died at the trade center, she and her family do have closure. i'm steve handelsman, nbc news, new york. >>> in tennessee, residents in low-lying areas outside of memphis are being evacuated from their homes as the muddy waters of the mississippi continue to rise. near record flood waters have even begun to pull in downtown memphis on to the city's famous beale street with residents up and down the banks of the mighty river fears that the worst is yet to come. nbc's jay gray has the details. >> reporter: flood waters continue to rise almost as fast as the tension across six states in the south. >> this is a serious matter. there's going to be