Who sent ricin letters to Bloomberg, Obama?


The deadly poison, which was sent in letters to President Obama, New York City Mayor Michael Bloomberg and Bloomberg’s Washington, DC organization Mayors Against Illegal Guns, can destroy any bodily tissue it comes in contact with. NBC’s Pete Williams reports.

Your Playlist Expand Collapse

Nightly Spotlight

Inspiring America

Nightly Films

World News


Stay up-to-date on the latest health and medical news.

Play All


Coverage of extreme weather events affecting people across the country.

Play All


The best political reporting from Nightly News and the NBC News politics team.

Play All

Full Episodes of Nightly News