7:31 am, Pacific Beach, San Diego, California, looking south. Heavy spraying had been going on all morning. Here another jet is in the process of spraying.

 7:32 am. A new trail is filling the air.

 7:33 am. The usual route from the southeast to the northwest, across San Diego County, repeats on a daily basis.

7:33 am, looking east. Morphing, white trails fill the eastern skies from planes which had tracked back and forth at dawn.