MSNBC Live with José Díaz-Balart 02/23/15

US on alert after al-Shabab calls for attack on mall

NBC’s John Yang and Bill Neely report on the fight against ISIS as new terror threats has the world on alert, including a new video released by al-Shabab, an al-Qaida offshoot in Somalia, calling on its supporters to attack malls in London, Canada, and ... more Duration: {{video.duration.momentjs}}