UFO Sighting in Louisville, Kentucky on May 30th 2015 – taking pictures of sun set.pictures have strange black dot. then meets another following a plane then leaving plane behins

Me and my daughter seen the way the sun light was cutting the clouds in pretty way she took a couple pics so I grab my phone and started snapping some pics. She said ohh your pics r better will u send me one. I flipped through to send her the best one. That's when I noticed a black dot I had no clue what is was a I said to her what if its a UFO..lot then I looked at another it wasnt there. So I zoomed in and there it was really far away. The next picture had it closer again but at bottom of a vapor trail. The next one had it closer to plane but below another one. The next one had them ahead of the plane. Within a minute this black dot travels through my pictures from close to far to back close and to the right of pictures within a minute or less the pictures are dated and timed.