The US & Canada agreed to divert the Niagara River to protect the Niagara Falls from eroding.
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The Duquesne Spy Ring, a Nazi German espionage network, was sentenced to prison.
A bus plunged 400ft from a cliff in Malshej Ghat, India, killing thirty people.
The Alemanni crossed the frozen Rhine in large numbers and invaded the Roman Empire.
The Moon was photographed for the first time.
The mapping of Mars' surface began.
