How will the attack in Berlin shape the debate over terrorism and national security in the U.S. and globally? MSNBC's Brian Williams discusses with terror experts Evan Kohlmann & Shawn Henry.Dec. 21, 2016
UP NEXT
Mike Johnson gets Ukraine aid passed, risking his speakership
05:23
Opening statements in first Trump criminal trial
10:11
'There is nothing there': Stephanie Ruhle exposes how economic insiders view Truth Social stock
11:27
'A lot will depend on how much damage was done': Brennan on next steps after Israel launches strike in Iran
07:22
High gas prices threaten Biden campaign
06:07
'The end of his quest for Manhattan's approval': How Trump's trial exposes his insecurities