investigators believe this had to be an inside job. jenna: i wonder where they will find that or maybe not? we'll see. new concerns for safety and security of americans overseas. intelligence sources uncovering a possible plot by the islamist group al-shabab calling for kidnapping of u.s. citizens as retaliation for the capture of an al qaeda suspect, abu anas al-liby, who is currently in custody in new york city. chief intelligence correspondent catherine herridge is joining us live from washington with more on these threats. so what are we learning today today, catherine? >> reporter: jenna the capture of al qaeda operative al-libi by u.s. special forces in libya has become a lightning rod for jihadists throughout north africa and middle east. after capture in tripoli street by delta forces there are new calls to kidnap american citizens in retaliation for al-libi's capture and significantly jihadists are