hi jt,
okay. but for me, it is piffling next to the world trade centre and the pentagon.
in its heyday, aq was trying to harm the whole economy (eg wall street), or to attack american power (eg the uss cole, the african embassies), or to close down entire travel networks (planes, trains and tubes).
stopping a race achieves nothing much. it isn't even up to the horror standard of newtown.
this sounds like folks who don't reach the aq threshold. it's even sub-ira terror. third division effort with relatively low energy bombs.
for comparison: http://en.wikipedia.org/wiki/Remembrance_Day_bombing