zawahiri saying do something. do something big, do something now, and that set off alarm bells across washington. this is some of the most sensitive intelligence that the u.s. has. in fact we want to be very clear. cnn had this information over the weekend. we made a decision not to broadcast a lot of specific detail because the government had some concerns about the security risk potentially, potentially involved. but then other news agencies, including "the new york times" and the mcclatchy news service published it, it was in the public arena very widely and we wanted to let our viewers know everything that we know about it. erin. >> barbara starr, thank you very much. reporting from the pentagon, as we said. a tough decision to be made and you can see exactly how we here at cnn made that decision. i want to bring in congressman adam schiff now, a member of the house intelligence committee, and talk about exactly what it is that we do know. congressman schiff, thank you so much for taking the time. >> you bet. >> what more can you tell us about this message from