http://www.nytimes.com/2014/12/01/world/middleeast/egypt-islamic-state-allies-say-they-killed-an-american-worker.html 2014-12-01 05:30:40 Egypt: Islamic State Allies Say They Killed an American Worker An Egyptian militant group that has pledged allegiance to the Islamic State extremist organization claimed responsibility on Sunday for the killing of an American petroleum expert, according to the SITE Intelligence Group. === An Egyptian militant group that has pledged allegiance to the Islamic State extremist organization claimed responsibility on Sunday for the killing of an American petroleum expert, according to the SITE Intelligence Group. Western officials said that the American, an Apache employee named William Henderson, 58, was killed during a carjacking in the desert in August by fighters from one of