Of course they will; and here's why!
The terrorists linked with Islamic radicals generally subsumed under the heading of al Qaida have been winning our war on terrorism and their war against anyone who would resist their goal of nothing less than world domination.
So when and where will they attack again? Here it's anyone's guess. They will strike where they have opportunity to make the biggest impact on the American and world psyche. It could be big; it could be small; it really makes little difference. All the terrorists need to demonstrate is that they have the will and the means to strike, unexpectedly on American soil. And of course they need the media to amplify and to disseminate their message of terror.
Editorial note: It may not be immediately apparent that this posting 'slipped out' prematurely when emergency maintenance was being hastily performed to off-set a keyword spam attack that was threatening to shut-down this website plus several others linked through the same server. Nuisance postings in excess of 10,000 are being deleted as time permits. Meanwhile, the main drain on the server resources (over 30GBs of traffic) has been stopped and the Internet resources provided through this and related websites remain up and running. This commentary may eventually be completed, but for now it stands as a 'slip' and will not be removed because it has already been indexed and read by many viewers. Sorry for any inconvenience.
Cheers,
"The Professor"