U.S. president Ashton is in Salamanca, Spain to announce plans for a major global summit on terrorism. As he stands behind the podium in front of a loudly cheering crowd, he is shot twice. This is followed minutes later by a small explosion and then a massive blast. Secret Service agents Barnes, Taylor, and Holden immediately jump into action, trying to find the terrorists responsible amid all the chaos. First, the events are seen through the eyes...