As of now, 20 states have legalized marijuana for medical purposes, and voters in Colorado and Washington have approved marijuana for recreational use. About a dozen more states are expected to legalize marijuana in some form over the next several years.
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.
Pack liquids and gels in your checked baggage. However, there are specific rules created by the Transportation Security Administration (TSA). You are permitted to carry on 1 quart-size, clear plastic, zip-top bag that holds 3 ounces or smaller containers of liquid or gels.. There is a limit of one bag per traveler.