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On this date 2/23: polio & Iwo Jima
On this date in 1954, the first mass vaccination of children against polio began. The field studies of Jonah Salk’s then-experimental vaccine would become one of the largest clinical trials in history.
And in 1945, six Marines were photographed raising an American flag on Iwo Jima. It would quickly become an iconic image of World War II. In the following weeks, half the men captured in the famous picture would be killed in action.
via @BillMoyersHQ