Health workers, two male and one female, wear red emergency outfits, stethoscopes, and bullet-proof vests as they  pose beside their yellow ambulance at a hospital in Kharkiv.
Health workers pose beside their ambulance at a hospital in Kharkiv, where they have been working despite constant shelling from Russian troops encircling the city on April 20, 2022.  Alex Chan Tsz Yuk/SOPA Images/LightRocket via Getty Images