September 16
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1958 - The USS Grayback has its first operational launch of its "Regulus II" surface-to-surface missile off the California coast.
- The payload consisted of mail (it was also the first US mail sent by guided missile).
- Not to be confused with the planet, Regulus II
1987 – "The Montreal Protocol" is signed to protect Earth's ozone layer from depletion. It agrees to phase out the production and consumption of man-made compounds known to deplete ozone in the stratosphere