These intelligence failures changed the world. Welcome to WatchMojo and today, in this unranked video, were looking at 10 times the worlds intelligence agencies failed, often with tragic consequences. Our countdown of the biggest intelligence failures in world history includes The Tet Offensive, Hamas Attacks, 9/11, and more. Let us know which of these incidents you think was the most significant failure.

Watch more great history videos here:
Top 10 Worst Decisions in History: https://youtu.be/TjPmk62WajE
Top 10 Mind-Blowing Alternate Histories That Almost Happened: https://youtu.be/3M4aYRHnqpA
Top 10 Historically Accurate Movies: https://youtu.be/_q8NCKx3Pgw

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#History
#Intelligence
#Failures
#War
#Attacks
#WorldHistory
#Fails
#Disasters