ICE: Two detainees killed, one hospitalized at Dallas ICE field office shooting

Well, let's go over what we know right now. And joining us to do so is NBC News senior homeland security correspondent Julia Aninsley MSNBC national correspondent Rosa Flores along with former FBI senior official Chris Olirri and former DC Chief of Homeland Security and Intelligence Denell Harvin. Rosa, I know you've been working the phones. What more are you learning about this attack? Well, I talked to someone from the FBI, a spokesperson who said that FBI agents are headed to the scene and that the scene ...