Baggage carousel of a domestic airport.

You arrive at the checkpoint to the sound of a transportation security officer reminding travelers to remove liquids, gels and aerosols from carry-ons. To the seasoned traveler this is old news, but to the seasonal traveler it might be a surprise. Regardless of your personal travel experience, the international traveling community agrees – TSA's 3-1-1 for liquids makes security sense. Countries around the world support TSA's approach to reducing the amount of liquids, gels and aerosols passengers can bring in their carry-ons. The rule limits the volume of liquids, gels and aerosols to bottles 3 ounces or smaller (or 100 ml), in 1 quart-sized zip top bag, and 1 bag per traveler.

Flight Guide - Updated for 2002!

Allow extra time:

Heightened security measures require more time to properly screen travelers. Travelers should contact their airline to find out how early they should arrive.

Check-in:

Screener checkpoints:

At all times:

Items permitted in aircraft cabins:

From: http://www.tsa.gov