Alien Spacecraft????

What was it?

Early this week a UFO was seen over California, and it has ignited skeptics across the US.

Now because something is a UFO that doesn't immediately mean aliens. UFO means Unidentified Flying Object. That being said, it was definitely a UFO. Now the question arises, was it an alien ship or a missile? The government is saying it was a missile test, but many are saying that is the generic cover up story. What do you think of this story? Is it an alien ship or just a missile test?