Two jets crossed paths over Lambert’s FAA Tower.

Contrails are the long cloud-like vapor trails that form behind aircraft as they jet across the sky. On a clear blue day, like we’ve seen in recent days, its easy to see the weave of crisscrossing steaks which are made up of water vapor in the exhaust of aircraft engines. In the picture above, the paths of two jets were aligned along the same track as they flew over St. Louis. The eastbound jet’s contrail was already breaking up into whispy puffs as the westbound jet flew over Lambert’s FAA’s Air Traffic Control Tower.