WINO your point about getting some sort of Universal ID card is easily understood. But the carriage of weapons by ordinary (non law enforcement) pilots across international borders as a means to that end is impractical reality. Keep in mind that reciprocating multinational and bilateral agreements would also have to permit pistol toting pilots of foreign air carriers to enter the US of A. How would you manage the logistics of concealed weapon permits for literally hundreds of thousands of airline pilots operating cross border flights?
Just because the U.S. Congress had approved it, doesn't mean that the U.S. Senate will approve it, nor does it mean that the White House will approve it, nor does it mean that the managements of the airlines will approve it, and most importantly, nor does it mean that individual foreign governments will allow pistol toting aerial cowboys of U.S. carriers to land their airplanes in their country.
Think about it. And then think some more about it. The bottom line is that domestically it might be possible; internationally, the issue is deader than dead.
