Besides the great info jwbulldogs gave you, it hurts because you were kicking and applying strong force and pressure onto your foot. It can be from improper kicking, or too much. Take care of it, apply ice, see what happens.
If the injury and pain persists, perhaps see a doctor. You may have a micro fracture or simply a bruised bone. Who knows?
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.