There are currently only 13 members of the Senate who served in the military. In all, 97 members of the next session of Congress will have served in the U.S. military. That means less than 18 percent of the new congressional delegation served in the armed forces.
the layer of the earth resposible for the earths magnetic field is the core which consists of the liquid core/outer core and the solid core/inner core.
Measuring the Magnetic Field of the Earth. To first approximation the magnetic field of the Earth is a dipole field. This means that near the magnetic poles the field is perpendicular to the ground, whereas halfway between the poles it is parallel to the ground.