Robin Symcox News Today : Breaking News, Live Updates & Top Stories | Vimarsana

Theory out there for federal authorities relating to a new york post reporter that they believe this perhaps was meant for the new york marathon that was canceled because of superstorm sandy, and they adjusted to the boston marathon. how flexible, how adjustable are these terrorists? >> very flexible. that's without knowing ins and outs yet, that is conceivable. there is a geographical proximity that would make it possible. you have to remember, these terrorist groups are so determined and so willing to kill and use opportunities they can, that it seems entirely possible they would be able to ...

This attack has many americans asking this morning are american streets the new battle field for extremists? we have not had that fear, unlike our friends in israel and elsewhere. we have a terror expert and research fellow in london. he investigated that city's terrorist bombings in 2005. robin, thank you so much for being here. do you see similarities? >> the similarities in the way that terrorists intend to frighten people, to kill, to bring chaos into the streets of cities and landmarks and institutions that we know so well. in terms of operation there, i think things -- we're going to hav...