sentences:  IntelCenter offers "Qaeda" tapes for sale on its website.Neal Krawetz did an error level analysis of the As-Sahab and IntelCenter logos on "a 2006 al Qaeda video of Ayman al-Zawahiri".He originally told Kim Zetter of "Wired News" that the logos had "the same error levels and that this indicated they were added at the same time" (Zetter's words).