Well, they didnt say to get out the duct tape and plastic window sheeting.
The phrasing has me wondering. The bombs were too small, even if they were/are dirty bombs to panic the whole city. Dirty bombs need particulates to cling to, to be "effective." Lots of smoke on these two explosions. Just thought it was odd. May have been precautionary too.
Muslims cheer terror bombings in Boston
http://www.jihadwatch.org/2013/04/muslims-cheer-terror-bombings-in-boston.html?utm_medium=twitter&utm_source=twitterfeed