Bergen's analysis with some pretty interesting data
<snip>
One possible guide is recent history: In the years since the 9/11 attacks, dozens of extremists have plotted to use explosives to further their causes in the United States.
Of the 380 individuals indicted for acts of political violence or for conspiring to carry out such attacks in the U.S. since 9/11, 77 were able to obtain explosives or the components necessary to build a bomb, according to a count by the New America Foundation.
Of those, 48 were right-wing extremists, 23 were militants inspired by al Qaeda's ideology, five have been described as anarchists and one was an environmentalist terrorist.
<snip>
While the perpetrator or perpetrators of the Boston bombing are as yet unknown, an analysis of the 77 people based in the United States who have assembled bomb-making materials or tried to carry out a bombing for political purposes since 9/11 shows they have overwhelmingly been motivated either by al Qaeda-like ideas or right-wing extremist ideology.
<snip>
http://www.cnn.com/2013/04/16/opinion/bergen-bombings/index.html?iid=article_sidebar
= new reply since forum marked as read
