Humanitarian Corridors, from Syria to Ukraine

Refugees fleeing fleeing the military operation zone from the Mariupol area of Ukraine sit in a bus as they arrive at the border crossing in Veselo-Voznesenka, Russia, Monday, March 7, 2022. (AP)

As more Ukrainian towns and cities come under siege, concern is mounting for millions of civilians in the crossfire.

Russia has announced the establishment of safe corridors to allow civilians to leave, but there appeared to be few takers. Evacuation routes led mostly to Russia and its ally Belarus, drawing withering criticism from Ukraine and others. And Russia continued to pound some cities with rockets even after the announcement of corridors.