Letters Tainted with Ricin Sent to President Obama, Congress
Clip: 04/17/2013 | 6m 12s
In aftermath of the attack in Boston, letters sent to President Obama and members of Congress tainted with the poison ricin were intercepted by authorities before delivery. Hari Sreenivasan talks with WNYC's Todd Zwillich, who says the potential scare has many edgy especially on such an unusual day on Capitol Hill.
Aired: 04/17/13
Problems Playing Video? | Closed Captioning