[cont'd from summary paragraph]
There are people who are much better than me at elaborating and presenting this information. So, most of this article will be to present you with the news links I would like you to research and consider. There are two reasons why I believe the risk for a staged terror event is highly elevated.
1. The Boston false flag op.
2. Evidence of Ricin in the mail, together with John McAfee's (yes, the guy who likely wrote your anti-virus software years ago, if you happen to us MS Windows) dire warning, and claim of direct evidence that this is in the works.
1. is overly discussed in the Blogosphere, but here is a good summary by Radio host Alex Jones that was recommended by steve piezcinic
What I believe 1. boils down to is that any highly successful larger (>250k) liberal city is a target to be used to assign the blame on right wing nutter groups and for rogue elements within the government to push drafting of a patriot act version two. The risk of a second false op later this week is on ther order of 1/10 (I can only guess, but that's my best rough guess) an there are maybe on the order of 20 successful large profile liberal cities in the country. So, I arrive at this short term risk estimate: 1/10*1/20=1/200
2. is more dangerous, and really something to look at and consider considering the context and recent trace results. Google Ricin McAfee . Or Ricin mail.
Please feel free to tack on comments or useful links.