us postal service

USPS closed Wednesday to honor George H.W. Bush

The US Postal Service announced it will "suspend regular mail deliveries, retail services and administrative office activity" on Wednesday for the national day of mourning honoring the late former President George H.W. Bush.

Clues examined in serial bomber case

Law enforcement officials from New York to Florida are examining clues to find the person or persons who sent 10 packages containing what appear to be explosive materials to prominent Democrats, critics of President Donald Trump, and to CNN's New York offices as authorities classify the incidents as domestic terrorism.

Ricin Fast Facts

Here's a look at ricin, a natural, highly toxic compound that is extracted from castor beans.