SNIPPET: "U.S. officials familiar with intelligence reports said the websites of Ansar al-Mujahidin, Shumukh al-Islam and Al Fida — all accredited as official outlets of the terrorist group once led by Osama bin Laden — were knocked off the Internet by cyberattacks in early May. Two of the sites — Ansar al-Mujahidin (as-ansar.com) and Shumukh al-Islam (shamikh1.info) — came back up Monday and Tuesday. The site Al Fida remains down." SNIPPET: "The disruptions are prompting many jihadists to shift from Web forums to Twitter for communications and propaganda messaging."