Name: 'Humanitarian catastrophe' unfolding in Aleppo
Uploaded: Tue Dec 13 2016 18:36:27 GMT+0000 (UTC)
Duration: 3 min 51 s
Description: NBC's Ayman Mohyeldin says Americans should be concerned about the situation in Aleppo because it's a "humanitarian catastrophe." Mohyeldin and NBC's Katy Tur discuss the latest details.

Dec. 13, 201603:51