A man sees a UFO by watching out plane window

On December 3, 2013, while he was in an aircraft above the city of Key West (Florida), an occupant has photographed a strange black UFO, when he watched out plane window. Object looked like a short cigar. But, photo is too fuzzy to see exactly its shape.

Witness states:

Looking out plane window while ascending above the clouds below when notice a Grey circle out the window just hovering. I took 2 photos as it maintained in the same area and lost sight as plane continued ahead.