ISIS victims returning home, with thirst for revenge

Sharu Baharu, an 80-year-old with a magnificent handle-bar mustache, is facing his second winter on Mount Sinjar, where a bitter wind kicks up as the sun sets over the barren cliffs.

Until last year, he had lived his entire life in the town of Sinjar below.

Then, over a few days during August 2014, 5,000 men and boys in Sinjar and nearby villages were massacred, according to U.N. estimates.

"We fought as long as we could, but we had no weapons and they had so many," Baharu says, gesturing with his index finger for emphasis. "We saw so many killed, but we escaped at night and came to the mountain."