Vladka Meed, who with her flawless Polish and Aryan good looks was able to smuggle pistols, gasoline for firebombs and even dynamite to the Jewish fighters inside the Warsaw Ghetto, and who after the war became an impassioned leader in the national effort to educate children about the Holocaust, died Wednesday in Phoenix. She was 90.

She died after a steady decline from Alzheimer’s disease, said her son, Dr. Steven Meed.

With her husband, Benjamin, and a handful of other survivors, Mrs. Meed took a leading role in efforts to get the world to acknowledge what the Nazis had done to the Jews of Europe. It was a difficult proposition, given the impulse of so many people after World War II to put the slaughter behind them....