Broadly speaking, the use of force by law enforcement officers becomes necessary and is permitted under specific circumstances, such as in self-defense or in defense of another individual or group. There is no single, universally agreed-upon definition of use of force.
Lead poisoning. Lead poisoning is a type of metal poisoning caused by lead in the body. The brain is the most sensitive. Symptoms may include abdominal pain, constipation, headaches, irritability, memory problems, inability to have children, and tingling in the hands and feet.
Obviously, the longer one stays near a source of radiation the greater will be the exposure. The same is true of proximity to the source; the closer one gets to a source of radiation the greater the exposure. Shielding is of special importance when time and distance cannot be completely utilized as safety factors. In such instances lead, which is an extremely dense material, is used as a protective device.