most comprehensive coverage of the terror attack and the boston marathon. we have so much more information to tell you b ahead this hour, as we said, the fbi taking the lead in this investigation, raising the mobilization efforts to level one. we'll tell what you that means. plus, we'll have the latest on the search for the suspect. major u.s. cities like miami, new york, chicago, los angeles, they are all on a heightened state of alert this morning. how this attack in boston could affect your town today. and, of course, the american psyche. i can tell new boston our psyche is full of pride right now, full of honor. you know, how will the country, how will the city bounce back from the bombings? stay with us. at tyco integrated security, we consider ourselves business optimizers. how? by building custom security solutions that integrate video, access control, fire and intrusion protection.