Recreational Marijuana States. Four states, including Alaska, Oregon, Colorado, and Washington, as well as Washington D.C. have passed ballots legalizing recreational marijuana. The amount you can possess at one time, however, varies between the states.
As of January 31, 2014, passengers traveling internationally into the U.S. and connecting to another flight are allowed to have in their carry-on baggage liquids in excess of 3.4 ounces (100 mL) that were purchased as duty-free merchandise.
The TSA's flight safety rules about bringing liquids on board planes remain in effect. Travelers may now carry through security checkpoints travel-sized toiletries (3 ounces or less) that fit comfortably in one quart-size, clear plastic, zip-top bag, states the TSA's web site on flight safety.