The overall trajectory doesn't bode well for Bruce Willis' A Good Day to Die Hard, which opens in two weeks.

CNN: STORY HIGHLIGHTS

In any event, the overall trajectory in Iraq, a steady decline of incidents in the past three months, is still quite significant.

CNN: Transcript of Iraq hearing statements

And those disagreements are not new, and I have to say that the amount of turbulence, as you put it, that occurred was actually relatively modest when you look at the overall trajectory of U.S.-China relations.

WHITEHOUSE: Nuclear Security Summit: Presidential Press Conference