credits:
Berlin Wall - History, Dates & The Fall
Berlin Wall | Definition, Length & Facts | Britannica
the entire history of the Cold War explained | best Cold War documentary
the Berlin Wall (1961 - 1989)
the rise and fall of the Berlin Wall - Conrad H. Jarausch
history brief: the Berlin Wall explained
the Berlin Wall - how it worked | DW documentary
why the wall Rose--and how it fell - National Geographic
World War 1: summary, causes & facts - HISTORY,
10 little known facts about WW1 | sky history TV channel
Berlin Wall quotes - BrainyQuote
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