Was this a missile or plane near Louisville early Friday morning around 6:50 am? The answer...just a normal old jet plane. The jet plane most likely taking off from Standiford Field. Once the plane reached the right altitude, the contrail (condensation trail) formed.
The difference between this morning's contrail, and the one near California earlier this week is the direction the plane is flying. Our plane is flying away (look at the video), and the California plane (picture right) is approaching - which makes it look like it's going straight up (like a missile).
The Earth is round, which makes horizontal contrails - like these - appear vertical. Sunrises and sunsets help amplify the optical effect. Take a look at the Science of the Contrail Mystery, and how this mystery has been flying around many times in the past!