keywords: laden trenches afghanistan mujahedeen osama
text: Laden aide says US forces driven into trenches in Afghanistan &lt;b&gt;...&lt;/b&gt; Osama bin Laden #39;s aide, Ayman al-Zawahri, said Thursday in a videotape broadcast by al-Jazeera TV that mujahedeen (holy fighters) have taken control of much of Afghanistan and driven US forces into the  quot;trenches quot;.