The finalized copy of the United States Declaration of Independence was signed by congress.
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Musical.ly and TikTok merged, combining the users of both apps to form one community.
Adolf Hitler became Führer of Germany following the death of President Paul von Hindenburg.
Letter collections started being collected from mailboxes in Boston, US.
A bomb exploded at the railway station in Bologna, Italy.
English clockmaker Daniel Quare gained the patents for a portable barometer to measure air pressure.