Why your duty-free alcohol can vanish at a layover

A closer look

You successfully navigated the international terminal, bought a two-hundred-dollar bottle of rare scotch in London, and landed in America feeling incredibly victorious. But wait, you have a domestic layover. The moment you leave the international customs zone and attempt to re-enter domestic TSA security, your precious, sealed duty-free bag instantly violates the sacred 3.1-ounce liquid rule. The unyielding agents will gleefully force you to throw away your liquid gold in front of everyone unless you desperately check your carry-on.