A primary function of a Forward Air Controller is ensuring the safety of friendly troops. Enemy targets in the Front line ("Forward Edge of the Battle Area" in US terminology) are often close to friendly forces and therefore friendly forces are at risk of friendly fire through proximity during air attack. The danger is twofold: the bombing pilot cannot identify the target clearly, and is not aware of the locations of friendly forces. Camouflage, constantly changing situation and the fog of war all increase the risk. Forward Air Controllers are not needed for air interdiction, the term used for air attacks conducted at further distances from friendly forces.