Name: Terror experts eye pattern after Berlin Christmas market attack
Uploaded: Wed Dec 21 2016 02:39:03 GMT+0000 (UTC)
Duration: 8 min 32 s
Description: Rukmini Callimachi, who covers terrorism for the New York Times, talks with Rachel Maddow about the latest intelligence has learned about connections between recent terror attacks and terror groups like ISIS.

Dec. 21, 201608:32

Terror experts probe recent spate of attacks