SNIPPET: "WASHINGTON, April 2 (UPI) -- A blackout of al-Qaida's main Web sites is in its 11th day, and officials think the forums may have been brought down in a cyberattack. While no one has claimed credit for disabling the sites..." SNIPPET: "The loss of information typically confuses and frustrates the readers of the Web sites. "It leaves the rank-and-file to guess which messages and which messengers are genuine al-Qaida, and provides undercover operators with new opportunities to disrupt the movement," said A. Aaron Weisburd, senior fellow at the Homeland Security Policy Institute."