It was a blue sky without a single wisp of cloud, until these airplane trails
appeared one at a time all heading straight for the spot where the sun was going
to go down over the horizon. The first picture, from another day, shows the kind of blue sky it
was looking again towards the west. Cloudless skies used to be rare in New York, but now they're normal. It's usually when
the sky is cloudless that these trails appear in various arrangements. The
trails follow upon the cloudless sky and do not cause it. The next group of pictures I took from my window
in Manhattan looking towards southern New Jersey. None of the white stuff is
from natural clouds of which there were none that day. I don't know who took the
rest.
