up in a frenzied mob several hundred men celebrating the fall of mubarak forcibly separated from her security, she suffered in the words of a cbs news statement, "a brutal and sustained sexual assault and beating before being saved by a group of women and an estimated 20 egyptian soldiers. the statement also revealed logan was in the hospital. today she's back home and we learned president obama telephoned her. it is hard to imagine anyone reacting to what happened to logan with anything but concern and caring. but this man, nir rosen, had a very different reaction. he repeatedly made jokes on twitter about logan's attack. but nir rosen is not a no one. but he's a journalist who has reported extensively from iraq and a teacher at new york university. he's now stepped down from his fellowship. rosen has now apologized for his numerous offensive tweets but he continues to claim he did not know at the time that logan was sexually assaulted. numerous facts, however, seem to contradict that.