International atomic experts have warned of a potential nuclear disaster with Ukraine's Zaporizhzhia plant in the middle of a war zone, bringing back terrifying memories of Chernobyl.

Ukraine marked 90 years since a terrible famine that killed at least 4 million of its people. The event was especially poignant this year as Ukraine deals with its present crisis.

Veterans of the Soviet Union's decade-long war in Afghanistan see parallels — and stark contrasts — with the U.S. experience and exit after two decades there.