8. Mexico
Airport security in Mexico that ranks 8th on our list of countries with the strictest customs, border control and airport security in the world is pretty tight. I came across a testimony of a passenger whose contact lens solution was confiscated at Mexican airport (he always carried the solution and never had problems with customs and airport security). Even if you buy a bottle of water after the security check you are not allowed to bring it on board. Passengers are sometimes checked again at the gate. Also, Mexican border has one of the strictest border controls in the world because it was/is the site of many illegal crossings. Besides the physical wall which marks the U.S.-Mexican border, this crossing is also guarded by border patrol. Everyone crossing this border will have their documents closely examined, including the U.S. passport holders.
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