What do grenades, eels, snakes, and ninja throwing stars all have in common? That’s right, you guessed it! They’re all things that passengers tried to bring on the plane with them, only to have them confiscated by Transportation Security Administration employees.

What do grenades, eels, snakes, and ninja throwing stars all have in common? That’s right, you guessed it! They’re all things that passengers tried to bring on the plane with them,...