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February 23 in history: First mass polio vaccine, Panama Canal Zone, and more

1904
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1904

US acquires control of Panama Canal Zone for $10 million

1917
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1917

The February Revolution begins in Russia

1947
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1947

International Organization for Standardization (ISO) begins operating

1954
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1954

The first mass inoculation against polio is conducted in US

1998
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1998

Osama bin Laden issues fatwa declaring jihad against Jews & Crusaders