Name: Former security adviser: We have to be vigilant
Uploaded: Fri Aug 29 2014 14:22:15 GMT+0000 (UTC)
Duration: 3 min 1 s
Description: Former Clinton National Security Adviser Samuel Berger discusses the continuing threat that ISIS poses to the global community in light of the UK’s decision to raise its terrorism threat level to “severe.”

Aug. 29, 201403:01