Correct, there were no planes but maybe a hologram at best. Their story had way too many holes. You can even see that the plane had no shadows going into the building and was left as a shaded 3D model render with no volumetric lighting, reflections, nor refractions. They didn't even do the math correctly, 2 planes taking own 3 buildings. We do not have missiles that can do that and defy the laws of physics.