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Preview: John Brennan

Name: Preview: John Brennan
Uploaded: 2016-02-11T18:12:23-0500
Duration: 59 s
Description: CIA Director John Brennan says ISIS has used chemical weapons and believes it has the ability to make mustard and chlorine gas. Watch Scott Pelley's report on Sunday, Feb. 14 at 7 p.m. ET/PT.

CIA Director John Brennan says ISIS has used chemical weapons and believes it has the ability to make mustard and chlorine gas. Watch Scott Pelley's report on Sunday, Feb. 14 at 7 p.m. ET/PT.