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.
Earth's Magnetic Field. The Earth's poles have switched over 150 times in the past 70 million years. No one knows what exactly produces the Earth's magnetic field. One theory is that the Earth's core is made up of solid iron and nickel, surrounded by a liquid layer of molten iron and nickel.