weapons). Loitering munitions, designed to loiter over a battlefield, striking once a target is located. Nuclear weapons use radioactive materials to create nuclear fission and/or nuclear fusion detonations. Primitive weapons make little or no use of technological or industrial elements. Ranged weapons (unlike melee weapons), target a distant object or person. Rockets are self-propelled projectiles. Suicide weapons exploit the willingness of their operator not surviving the attack. By target – the type of target the weapon is designed to attack Anti-aircraft weapons target missiles and aerial vehicles in flight. Anti-fortification weapons are designed to target enemy installations. Anti-personnel weapons are designed to attack people, either individually or in numbers. Anti-radiation weapons target sources of electronic radiation, particularly radar emitters. Anti-satellite weapons target orbiting satellites. Anti-ship weapons target ships and vessels on water. Anti-submarine weapons target submarines and other underwater targets. Anti-tank weapons are designed to defeat armored targets. Area denial weapons target territory, making it unsafe or unsuitable for enemy use or travel. Hunting weapons are weapons used to hunt game animals. Infantry support weapons are designed to attack various threats to infantry units. Siege engine is designed to break or circumvent heavy fortifications in siege warfare. Manufacture of weapons The arms industry is a global industry that involves the sales and manufacture of weaponry. It consists of a commercial industry involved in the research and development, engineering, production, and servicing of military material, equipment, and facilities. Many industrialized countries have a domestic arms-industry to supply their own military forces - and some also have a substantial trade in weapons for use by its citizens, for self-defence, hunting or sporting purposes. Contracts to supply a given country's military are awarded by governments, making arms contracts of substantial political importance. The link between politics and the arms trade can result in the development a "military–industrial complex", where the armed forces, commerce, and politics become closely linked. According to research institute SIPRI, the volume of international transfers of major weapons in 2010–14 was 16 percent higher than in 2005–2009, and the arms sales of the world’s 100 largest private arms-producing and military services companies totalled $420 billion in 2018. Legislation The production, possession, trade and use of many weapons are controlled. This may be at a local or central government level, or international treaty. Examples of such controls include: The right of self-defense Knife legislation Air gun laws Gun law Arms trafficking