Uzis or international plane tickets...

...Which is a bigger threat to US national security? Plane tickets, apparently. Because:

Length of time that information about passengers on European flights to the US will be retained by US government -- 3.5 years

Length of time that information about gun purchasers in US is retained under current legislation -- 90 days

Length of time it would be retained under pending legislation (reg. req'd) -- 24 hours.