“They were completely, completely empty.” Airlines are very clear about their carry-on bag policies. Passengers can bring onboard one personal bag and one carry-on of a certain size. But even ...

For almost 20 years, U.S. air travelers have been restricted to carrying liquids in 3.4-ounce (100 ml) containers, neatly packed inside a quart-size clear plastic bag - but new TSA technology is ...