Gwen Ifill talks with former deputy national security advisor Juan Zuarte and former senior FBI Official Don Borelli for their takes on the investigation and how authorities are sifting through evidence, as well as the president's characterization of the bombings as a terrorist attack.
Investigators are tracking down some two-thousand leads this morning after the twin explosions that occurred on Monday at the Boston Marathon. Officials are also poring over chilling photos showing the remnants of one of the detonated devices. Some of the images show wires, a battery and bits of what appears to be a circuit board. In addition, the FBI is now saying the second bomb was also in some type of metal container. This morning former Senior NCIS Official Robert McFadden weighs in on new investigation details regarding the Boston Marathon bombings...
Investigators are following every lead after yesterday's bombings at the Boston Marathon. Host Michel Martin speaks with Don Borelli, a former FBI special agent on terrorism, to hear how investigators piece together a crime like this, and determine who is responsible...
The Soufan Group's Senior Vice President Robert McFadden on protecting business from potential threats...
Former FBI special agent Donald Borelli talks with MSNBC's Chris Hayes about the next steps in the investigation into the Boston Marathon explosions.