Al-Libi, wearing a white traditional Arab robe and a black turban, also ridiculed the U.S. for its troubles in Iraq and Afghanistan, claiming the country's power and prestige was in decline.
"America, which is one of the major evil spirits of the age, was only a few years ago bragging about its power and boasting of its army and materiel, at a time when everyone was subordinate to it and submissive to its resolutions," said al-Libi, whose nom de guerre means "the Libyan" in Arabic.
"But today, where is America? Where is the vanity and arrogance of the American army and its policymakers?" he added. "And moreover, where is the value of the American soldier whose killing used to make headlines in all the media but who today is dragged in the streets of Baghdad, hung on the bridges of Fallujah, rolled on the rocks of Afghanistan and burned to coals in the middle of its capital, Kabul."
Al-Libi praised the resurgence of Taliban militants in Afghanistan, who have made a comeback following a U.S.-led invasion in 2001 that ousted them from power.
It might have been worth noting that at the start of 2007, the Taliban were promising a spring offensive to drive the infidels from Afghan soil, and at the end of summer 2007, the Taliban have suffered massive losses and inflicted only minor damage on Coalition forces and the Afghan government. al-Libi, al-Zawahiri and bin Laden can make grandiose claims in Webcasts from undisclosed locations, but they don't seem to be able to match their words with deeds.