My brother works night security, and he called me early (4:00 AM) this morning about a UFO in the sky. He even saw one "object" appear out of thin air... It is actually a contrail from a jet being illuminated by the sun a few moments before sunrise. The contrail is high altitude so it gets illuminated before sunrise producing this beautiful sight. I didn't have time to properly set up the camera so my several-second exposure made the background sky look brighter in the photos than it was in reality.
EDIT: Apparently this was not an airplane, but a missile test in New Mexico.