The Chinese used explosive vests during the Second Sino-Japanese War. A Chinese soldier detonated a grenade vest and killed 20 Japanese at Sihang Warehouse. Chinese troops strapped explosives like grenade packs or dynamite to their bodies and threw themselves under Japanese tanks to blow them up. This tactic was used during the Battle of Shanghai, where a Chinese suicide bomber stopped a Japanese tank column by exploding himself beneath the lead tank, and at the Battle of Taierzhuang, where Chinese troops rushed at Japanese tanks and blew themselves up with dynamite and grenades. During one incident at Taierzhuang, Chinese suicide bombers destroyed four Japanese tanks with grenade bundles. The use of suicidal attacks to inflict damage upon an enemy predates the Second World War, in which Kamikaze units and Kaiten were used to attackAllied forces. Japanese soldiers routinely sacrificed themselves by attacking Allied tanks while carrying antitank mines, magnetic demolition charges, hand grenades and other explosive devices.
Description
The explosive belt usually consists of several cylinders filled with explosive, or in more sophisticated versions with plates of explosive. The explosive is surrounded by a fragmentation jacket that produces the shrapnel responsible for most of the bomb's lethality, effectively making the jacket a crude, body-worn, Claymore mine. Once the vest is detonated, the explosion resembles an omnidirectional shotgun blast. The most dangerous and the most widely used shrapnel are steel balls in diameter. Other shrapnel material can be anything of suitable size and hardness, most often nails, screws, nuts, and thick wire. Shrapnel is responsible for about 90% of all casualties caused by this kind of device. A "loaded" vest may weigh between and may be hidden under thick clothes, usually jackets or snow coats. A suicide vest may cover the entire stomach and usually has shoulder straps. A common security procedure against suspected suicide bombers is to move the suspect to at least away from other people, and ask them to remove their upper clothing in order to see if there is an explosive vest strapped under them. While this procedure is relatively uncontroversial for use on males, it may cause an issue when dealing with females suspected to be suicide bombers. Male security personnel may be reluctant to inspect females or strip-search them; furthermore, security personnel doing strip-searches can be accused of sexual harassment. Alternatively, an infrared detector can be used. There are assertions that using a millimeter wave scanner would be viable for the task, but the concept has been disputed. The discovery of remains as well as incidentally unexploded belts or vests can offer forensic clues to the investigation after the attack.
Forensic investigation
Suicide bombers who wear the vests are often obliterated by the explosion; the best evidence of their identity is the head, which often survives because it is separated and thrown clear of the body by the explosion. Journalist Joby Warrick conjectured: "The vest's tight constraints and the positioning of the explosive pouches would channel the energy of the blast outward, toward whoever stood directly in front of him. Some of that energy wave would inevitably roll upward, ripping the bomber's body apart at its weakest point, between the neck bones and lower jaw. It accounts for the curious phenomenon in which suicide bombers' heads are severed clean at the moment of detonation and are later found in a state of perfect preservation several yards away from the torso's shredded remains."
