結果 : why do some planes have vapor trails
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What are CHEMTRAILS? Proving they EXIST by "CAPTAIN" Joe

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Why Do Aircraft Leave Lines In The Sky?

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2:13

Those long, thin clouds you see behind planes are contrails – not ‘chemtrails’

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0:44

Proof that CHEMTRAILS do exist!!!??? #shorts

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Why Do Planes Leave White Trails? The Surprising Science Behind It! #plane #planespotting #aviation

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What are "Condensation Trails?"

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Airplane Contrails or Chemtrails ?

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5:20

Verify: Is there a secret chemtrail spraying program?

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