Lots of hush hush on this report. The Pentagon was quick to label this an airliner, but folks that witnessed it said it was unlike any airliner vapor trail.
Geopolitical events at the time Obama took office would fit in line with China testing the resolve or sending a message to our newly elected government, sensing weakness (as always) within the democrat leadership.
This is/was my take on this mysterious vapor trail streaking from the horizon off the West coast of liberal-fornia.
https://www.cbsnews.com/news/mystery-missile-launch-seen-off-calif-coast/
The launch picture is dated 2010.