Meet members of the oldest and least known federal law enforcement agency.
The fact that you don't know much about them means they're doing their job. Meet the postal inspectors. These law enforcement agents of the US Postal Service monitor the millions of mail items that pass through every day. Their job: to keep you safe from suspicious and even deadly packages.
Access even more free Smithsonian Channel full episodes and documentaries online through participating TV providers.
Find out if your television provider carries Smithsonian Channel on air.
Don't panic! It's simple to upgrade to the latest version of one of these browsers:
Don't panic! To get the best possible experience on smithsonianchannel.com we recommend you upgrade your operating system.
For the best possible site experience, please use Chrome for Android.
Add username "SmithsonianChan" on Snapchat for fun and fascinating facts. We'll be sharing spontaneous photos and videos as inspiration strikes.