include destroying utility poles, blocking and destroying highways and being unproductive at work. The Contras also contributed to the sabotage campaign by attacking civilian targets such as healthcare clinics, schools and cooperatives, and industrial targets such as mining ports, pipelines and refineries. Civil servants such as doctors, nurses, judges and Sandinista National Liberation Front officials were also killed as part of the campaign. Sniper attacks Snipers have historically been used by insurgents as a method of psychological warfare and attrition in Iraq, Syria, Yemen, Vietnam and Northern Ireland, including mobile units transported in vehicles. The highly urban areas of the Yemeni and Syrian civil wars and the Iraqi insurgencies and the rural areas of the Vietnam War and The Troubles provide ideal cover and positions for insurgent snipers, who kill or injure soldiers whenever possible and melt away to avoid enemy reinforcements and counterattacks. Insurgents in Iraq have used snipers, including vehicle-borne units, to isolate enemy combatants from larger forces and strike at officers and commander—a demonstration of their technological capabilities and tactical patience. They generally engage targets from 100 to 1000 meters and primarily use the SVD sniper rifle, however they have also been known to use .50 Cal and captured coalition M24 sniper rifles. Although an insurgent sniper unit usually operates from a dominant terrain feature, they have also seen shown to use cars and vans resourcefully to quickly move from position to position. The sniper or snipers usually films the shot, extracts, and then posts the very graphic and shocking event to the internet for propaganda purposes, focusing on lucrative targets that will earn them a lot of media attention. Suicide attacks Hezbollah's attacks in 1983 during the Lebanese Civil War are the first examples of the modern suicide terrorism. Workers Party of Kurdistan (PKK) used its first suicide attack in 1996, and al-Qaeda in the mid-1990s. The number of attacks using suicide tactics has grown from an average of fewer than five per year during the 1980s to 180 per year between 2000 and 2005, and from 81 suicide attacks in 2001 to 460 in 2005. These attacks have been aimed at diverse military and civilian targets, including in Sri Lanka, in Israel since July 6, 1989, in Iraq since the US-led invasion of that country in 2003, in Pakistan since 2001, in Afghanistan since 2005 and in Somalia since 2006. Suicide bombings have also become