http://blogs.abcnews.com/george/2010/01/rudy-giuliani-no-domestic-attacks-under-bush-one-under-obama.html

This is an excellent lesson in how politics works, and in how political parties can play the press. 

Giuliani is not alone, you see:

http://rawstory.com/2009/2009/12/gop-strategist-matalin-bush-inherited-911-attacks-clinton/

http://www.youtube.com/watch?v=kzpy1GdIeCY

It is curious, I think, that they all have been having this memory lapse. 

In seriousness, though, this is by no means a new technique, but I do think it is a tad brazen to do it with regards to something as obvious as a terrorist attack.