Name: Johnson: Cybersecurity a new 'cornerstone' of DHS mission
Uploaded: Thu Dec 22 2016 02:41:39 GMT+0000 (UTC)
Duration: 6 min 2 s
Description: Jeh Johnson, Secretary of Homeland Security, talks with Rachel Maddow about who is responsible for the hacking of the 2016 election, the role of Vladimir Putin, and the importance of cybersecurity to homeland security.

Dec. 22, 201606:02

Johnson: Cybersecurity core to DHS mission