There are almost certainly much better pictures. This is just the pilot's selfie. The U-2 is built to take pictures. USAF: "The U-2 is capable of gathering a variety of imagery, including multi-spectral electro-optic, infrared, and synthetic aperture radar products which can be stored or sent to ground exploitation centers. In addition, it also supports high-resolution, broad-area synoptic coverage provided by the optical bar camera producing traditional film products which are developed and analyzed after landing. The U-2 also carries a signals intelligence payload."