Too soon for movie about 9/11?

Regarding the release of United 93--a movie chronicling the hijacking of an airliner on 9/11, I like what Rich Lowry has said about the "controversy":

We could be losing a major battle in the War on Terror in Iraq and seeing a flagging of resolve in the war generally, yet some people think we can't yet be reminded what started the whole thing: It's never too early to be defeated, but always too soon to recall the brutality of our attackers.

Read the rest of his op/ed here.