When Knight and Torres are standing on the roof and the bombs go off, they are at least a thousand yards away. The sound of the explosions should reach them around three seconds after they see them.
Air Force One VC-25 is referenced as version B. Version B will not be in service until 2027.
The plane depicted as Air Force One, a VC-25B is supposedly at Joint Base Andrews, but there are mountains visible in the background.
Curtis is standing with his back to a window, on the pretext hat he is there so that the sunlight will boost his vitamin D. He is fully clothed, with a full head of hair, so the only bit exposed to the light is the back of his neck and his hands. It won't help much.