May 15 in history: First hydrogen bomb tested, Harmonics Law discovered and more!

From the first female Premier of France to first hydrogen bomb being tested.

We have covered it all!

1618

Harmonics Law discovered

(Photograph:WION)

1718

World's first machine gun check patent.

(Photograph:WION)

1957

First hydrogen bomb tested

(Photograph:WION)

1988

USSR withdraws forces from Afghanistan.

(Photograph:WION)

1991

First female Premier of France

(Photograph:WION)

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