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.
Most airlines have a carry-on weight limit of 40 pounds. International airlines may have different restrictions for carry-on luggage. Again, it is always best to check with your airline first to get their exact requirements. Airlines enforce all size and weight limits much more strictly now than in the past.