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.May 30, 2013
UP NEXT
'A family's worst nightmare': Biden comments on school shooting in Nashville
02:07
'Heartbreaking': White House comments on Nashville school shooting
02:11
Biden and Trudeau to discuss migration, national security and climate change
03:51
Biden designates national monuments in Nevada and Texas
01:43
Biden signs bill that directs declassification of COVID-19 origins
01:21
Biden signs bill to declassify Covid origins intelligence