@CNN: Bombs and chemicals sent through the mail are rare but terrifying events. Here’s what postal services and government agencies look for when determining whether a package is suspicious. https://t.co/OWq7L0qY7f

Bombs and chemicals sent through the mail are rare but terrifying events. Here's what postal services and government agencies look for when determining whether a package is suspicious. https://t.co/OWq7L0qY7f

— CNN (@CNN) October 25, 2018