My new favorite Instagram is TSA, the Transportation Security Administration, which since last summer has been posting its intercepts of loaded semi-automatic handguns, Samurai swords, throwing stars, compound bows, grenades (real and simulated), brass knuckles and other stuff that people try to bring in their carry-ons. Some stuff isn't allowed on the plane at all. It's good to know that if you try to check a bazooka in your luggage, someone will try to stop you. The Instagram feed is also an admirable example of transparency from an agency that depends on it - literally.

Here are a few recent luggage surprises: