premise: About 20 minutes later , at 7:35 , another passenger for Flight 77 , Hani Hanjour , placed two carry-on bags on the X-ray belt in the Main Terminal 's west checkpoint , and proceeded , without alarm , through the metal detector and true is true and true is true and true is true and true is true and true is true .
hypothesis: About twenty minutes later , another passenger was able to move through the checkpoint without alarm .