Freelance journalist Steven Sotloff is seen during a work trip inside Al-Fateh Mosque in Manama, Bahrain, on Oct. 26, 2010. The Islamic State group released a video this week that showed a militant beheading the American journalist. Mazen Mahdi/EPA/Landov hide caption

toggle caption Mazen Mahdi/EPA/Landov

American journalist Steven Sotloff (left) talks with Libyan rebels on the Al Dafniya front line on June 2, 2011, in Misrata, Libya. Sotloff was kidnapped in August 2013 near Aleppo, Syria. Etienne de Malglaive via Getty Images hide caption

toggle caption Etienne de Malglaive via Getty Images