I just saved the JPEG and zoomed in and it’s obviously cloned smoke. The Missiles are probably inserted and the smoke is designed to cover the lack of launchers.
Someone from LGF pointed to this photo: http://www.daylife.com/photo/07z0fO0d5I2d3/missiles_iran as the original (or close to it.). So it looks like the third missile from the left was photoshopped in, using the plume from the second missile and the dust from the fourth.