Name: How many warnings did the FBI get about Tamerlan?
Uploaded: Wed Apr 24 2013 10:00:25 GMT+0000 (UTC)
Duration: 9 min 52 s
Description: Top Talkers: The Morning Joe panel -- Distinguished Senior Fellow at Demos Bob Herbert, fmr. Gov. Howard Dean, D-Vt. and Mike Barnicle -- discusses the latest in the Boston Marathon bombing investigation, Homeland Security Secretary Janet Napolitano's comments on Capitol Hill regarding immigration and what the FBI knew about suspected bomber Tamerlan Tsarnaev.

April 24, 201309:52