New Terrorist Attack?
I too have thought for some time that there would be another major attack, a devastating attack that might bring martial law and result in a military draft for troops to attack Iran. However, the one thing that has tempered my thinking was the realization that a terror attack would be a huge blow to the US economy, which actually is doing okay these days. Moreover, there are reasons to think that the US doesn't really want to attack Iran in the near future but rather the threats are all part of a power struggle to maintain extremists in power in Iran.
In any case, if the US really wants to maintain its super-power status, it is unlikely to self-inflict a major terror attack-- as long as the economy is doing well.
Remember, 9/11 occurred right at the onset of a national economic recession and conveniently hid a lot of financial shenanigans. So 9/11 was timed rather perfectly to distract from economic woes rather than to add to them.
One reason for a new terror attack would be to help prop up Bush's sagging poll numbers, right now they are clearly in the danger zone-- in the low 40's.
Another reason for a new terror attack would be to cover-up a major downturn in the US economy.