Ukraine-Russia crisis: What to know about the fears of war

A Ukrainian serviceman provides area security during a visit by Gen. Oleksandr Pavliuk, commander of the Joint Forces Operation, to frontline positions in a former industrial area, outside Avdiivka, Donetsk region, eastern Ukraine, Wednesday, Feb. 9, 2022. (AP Photo/Vadim Ghirda)

Ukraine-Russia crisis: What to know about the fears of war