** FILE ** Shown on a computer screen is a frame grab from a DVD prepeared by Al-Sahab production showing al-Qaida's No. 2 leader Ayman al-Zawahari delivering his address seen in Islamabad, Pakistan, shown June 20, 2006. When four Islamic radicals blew themselves and dozens of innocent commuters up on the London transportation system on July 7, 2005, it took nearly a month for al-Qaida No. 2 Ayman al-Zawahri to release a comment, saying in an Aug. 4 video tape that Britain itself was to blame for the carnage. (AP Photo/B.K.Bangash)