[MotleyGirl70]

The teen told police he was burning loose material off his tennis shoes

Gum perhaps?

[Ciexyz]

The father has shit for brains, too.

By the way, I know several local Pittsburgh residents who got airport security jobs. Several postal police officers transfered to the TSA to become air marshalls. Another young man is being hired as an Allegheny county police officer and will be stationed at the airport on a security detail. And a young woman marine, who just finished police officer training and is now based with the Marine Reserve, has been told that she will be sent to the airport detail.

[GingisK]

Gum perhaps?

Strings. I used to do this all the time to get those strings off my fatigues. I'd be gigged in inspection if I didn't.

[Cagey]

"I think I finally figured out what the flavor is in this gum. It's a little lo-meiny."