CAIRO, Egypt -- An Islamic militant Web site announced Monday that Osama bin Laden's second-in-command would soon release a new message addressing the conflict between Muslims and infidels. The Internet advertisement banner for Egyptian-born Ayman al-Zawahri, al-Qaida's No. 2, did not specify when the message would be released or whether it would be a video, an audiotape or text. The announcement, displayed on a site frequently used by militants, carried the logo of al-Qaida's media production wing -- al-Sahaba -- which usually releases videos.