The first line of defense is the gate and the trap. This gate is the a mechanical factor. It helps keeps the enemy's out if they get in. The trap is a chemical. It helps catch the enemy's if they get past the gate
The second line of defense is the guards and the laser cameras. The guards are the mechanical factor. the guards also represent the pathocytes. It fights and kills the enemy's when they get in. the chemical is the laser. the help the guards kill the enemy's off.
The third line of defense is the white house secret service and red button. The secret service is the mechanical factor. It always around the white house protecting. The red button is the chemical factor. In case the white house is being seriously be harm that button will come in hand.