[quote="TheLionPrince"]My mistake. Perhaps I should have used this link; Richard Clarke (former White House counter-terrorism advisor) states in this article that pressure cooker bombs have been found in Afghanistan and Pakistan, but that doesn't necessarily point to foreign involvement, as the pots used in the bomb are so widely available from retail stores to those founds in home, and instructions for how to build the bombs are easily accessed online by anyone.
So, I may have to take Regulus's side until further information about those involved are confirmed. So, it really doesn't narrow the nationality of suspects...at least for now.[/quote]
Another thing I want to add is the
Associated Press has confirmed that the "Pakistani Taliban, which claimed responsibility for the 2010 attempt in Times Square, has denied any part in the Boston Marathon attack."
However, the article states that Al-Qaeda's branch in Yemen gave a detailed description of how to make a bomb using a pressure cooker in a 2010 issue of
Inspire, though the article does not state they were involved.