It's strictly a countermeasure to prevent illegal activity specific to counterfeiting.

We interviewed the pilot and he was unaware that he had wandered into restricted airspace.

I can't comment to why he wasn't flown. The medical folks that were there would have weighed more into that than our people on the scene. Decisions were made on their advice at that point.

[The Secret Service is] engaged in enforcement and public education -- educating banks, retailers, money handlers and the general public. It's vital that we keep the banking industry up to speed on identifying and authenticating bills.

The intention was not to create a counterfeit-proof note -- which is basically impossible -- but one that's harder to duplicate and easier to authenticate. The new designs have definitely improved upon our efforts in detection and enforcement.

It's strictly a countermeasure to prevent illegal activity specific to counterfeiting. It's to protect our currency and to protect people's hard-earned money.