The US may soon follow in Europe's footsteps and eventually allow passengers to carry a one-liter bottle of soda or a full tube of toothpaste through airport security— but not yet. University of Illinois at Urbana-Champaign Professor and aviation security expert Sheldon H. Jacobson tells CNN Nightcap host Jon Sarlin why. #travelingtiktok #airports #tsa #airportsecurity #carryon