Photo editing was extremely complicated at that time to say the least. This picture was taken by an evangelist's photographer who was traveling via an airplane. It was taken during a storm with infrared film! Whether or not You believe this is a picture of an Angel or regardless if you trust the source or the authenticity of this photo, the fact remains that Jesus is Real! The Word of God says:
"Because you have seen Me, have you believed: Blessed are they who did not see, and yet believed" John 20:29
Worrying about the authenticity of this picture is not what is important, but your belief in Jesus as the Son of God, our Lord and Savior. Build your faith on His Word and not on this picture!