These are leftover from a commercial jet. Shorter length trails are caused by fuel (chemical) additives. The longer and more widespread chemical trails are done by DOD-DARPA jets. The one in photo is from a commercial jet
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15 pics + video today. West of Tampa Florida. Nothing edited. ☀️so blinding white I had to turn the exposure down full. You can see in [blank] shot just how bright the chem halo is! #geoengineering #nexrad #chemtrails #haarp #weatherwarfare #skywatchers