Irena Sendler was a Polish social worker who helped save 2500 Jewish children from the Warsaw Ghetto during World War 2 by smuggling them out in boxes, coffins, and other containers. She created false documents and identities, and worked with others to place the children within Polish families, convents, and orphanages to save them from Nazi deportation to concentration camps. Sendler's actions were successful in saving nearly 2500 children from almost certain death.