Many of the photographs of the war in Ukraine deserve to live as indelibly on the public record as those photos of Vietnam. We can only see the extent of the Russian-made horror because of these photos and the photographers who have risked, or given, their lives to get them: Lynsey Addario narrowly escaped death in the same mortar attack that killed the subjects of her photo; the body of the Ukrainian photographer and videojournalist Maksim Levin, a frequent contributor to Reuters, was discovered on April 1 in a village north of Kyiv. Mr. Levin was the sixth journalist killed in Ukraine since the beginning of the conflict.