The TSA has decided to finally close a huge loophole on its no-fly list, and that's got various Europeans, Mexicans and Canadians up in arms. Before, the no-fly list only applied to certain individuals taking off or landing at American airports. Now the TSA wants to apply the lists for flights that only overfly the United States -- but don't land or takeoff from here.

Why? Because a plane that takes of from Tijuana, Mexico en route to Vancouver, B.C., can still be flown into the TransAmerica Tower in San Francisco by terrorists.

But our "allies" are more concerned with their convenience than our safety.

Aeromexico, which has 18 weekly flights from Mexico City that cross U.S. airspace on their way to Europe, said that the U.S. proposal might violate international transit agreements and that it is consulting with the Mexican transportation department to "present our legal position for this potential requirement."

"This potential directive will restrict our privilege to fly across U.S. territory without landing, and to land for non-traffic purposes," said Fernando Ceballos, Aeromexico's assistant director for airport operations, in an e-mailed statement. If the TSA issues the requirement, he said, it would not be practical to fly around the U.S. coast. "Flying over water along the coast is not an option for Aeromexico as increased flight times would be prohibitive given the type of aircraft we use, our slots and crew requirements."

The Mexican government is really starting to get on my nerves. It decides to throw a temper tantrum over American security and it publishes guides to help its citizens illegally enter the United States while at the same time putting troops on its southern border preventing illegal immigration into Mexico from Central America.

One benefit of these sorts of brouhahas: it helps us figure out who our friends really are.