00:00Berlin Tunnel's biggest secret? Textbooks got it wrong.
00:05From 1955, U.S. and U.K. spies built a secret tunnel.
00:10They tapped Soviet lines.
00:13First, they gained unprecedented insights into Soviet military capabilities and intentions.
00:19Second, the tunnel exposed true Soviet military plans and hidden codes.
00:24Third, they gained unprecedented insights into Soviet military communications and strategic planning.
00:31These shocking truths about the Berlin Tunnel are often hidden.
00:35Find more at the link in bio.
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