Via the LA Times:
"We are aware of the unexplained contrail reported off the coast of Southern California yesterday evening," according to a statement Tuesday from the North American Aerospace Defense Command and the U.S. Northern Command, which operates the U.S. and Canadian missile warning system. "At this time, we are unable to provide specific details but we are working to determine the exact nature of this event.Thomas Pynchon must be proud.
"We can confirm that there is no indication of any threat to our nation and we will provide more information as it becomes available," the statement said.