Damage caused by the right wing to the second floor and façade is visible above, after the collapse.
The damage to the second floor from columns 18 to 20 can be clearly seen. Damage marks from disintegrating plane parts, perhaps from the tail fin and/or right wing, can be seen on the third and fourth floors of the building façade at column line 19.
Smaller damage marks are evident on the third and fourth floors at column lines 20 and 21. (© The Pentagon Building Performance Report)