Distributed computing is a field of computer science that studies distributed systems. A distributed system is a model in which components located on networked computers communicate and coordinate their actions by passing messages.[1] The components interact with each other in order to achieve a common goal.
In 1981 the Islamic Dawa Party's suicide bomber attacked the Iraqi embassy in Beirut. Hezbollah carried out a bombing of the US embassy in April 1983 and the attack on US Marine and French barracks in October 1983 which brought international attention to suicide bombings.
The U.S.-led invasion of Iraq, commonly known as The Iraq War or Operation Iraqi Freedom, began March 19, 2003. In February 2009, President Barack Obama announced a 16-month plan for withdrawal in Iraq. On June 30, 2009, U.S. troops withdrew from Iraq's towns and cities, formally handing over security duties to new Iraqi forces.