Please note that little is known about this open incident and what is “known” may later revealed to be mistaken.
Blogs covering the incident
Boston Police Department reports 23 injured and 2 dead
Boston Police, Fire, EMS live radio broadcast: http://www.broadcastify.com/listen/feed/6254/?rl=rr
FY 2008 Homeland Security Grant Program (HSGP) Supplemental
Guidance Information Focusing on Improvised Explosive Device
Deterrence, Prevention, and Protection
Secretary Napolitano Excerpt from Counter-IED Symposium .
Search here for additional information: http://search.dhs.gov/search?query=ied&affiliate=dhs
FBI and IEDs
Mar. 1, 2013 FBI Podcast on IEDs
Search here for additional information: http://www.fbi.gov/fbi-search?q=ied&siteurl=www.fbi.gov%2F#output=xml_no_dtd&client=google-csbe&cx=004748461833896749646%3Ae41lgwqry7w&cof=FORID%3A9%3BNB%3A1&ie=UTF-8&siteurl=www.fbi.gov%2F&start=0&q=ied++++