Was it a ufo or space x launch on West Coast...

https://www.washingtonpost.com/amphtml/news/speaking-of-science/wp/2017/12/23/a-ufo-sighting-briefly-freaked-out-the-west-coast-there-was-an-earthly-explanation/

http://money.cnn.com/2017/12/23/technology/future/spacex-launch-trail/index.html

Dang it, i was hoping it would be a UFO, but i was Ellon Musk sending another rocket into space. I guess thats a good things. It could have been worse, like an incoming ICBM from N. KOREA