"It's always in my mind": For World War II survivors, war in Ukraine stirs painful childhood memories

CBS News reporter Michael Roppolo explores the effects of armed conflicts on children in a personal essay after interviewing his grandparents about their childhoods during WWII.

U.N. human rights officials say dozens of children have been killed in Ukraine since the start of the war. Over one million more have fled as part of the fastest-growing refugee crisis in Europe since World War II, according to UNICEF.