"Did Osama bin Laden act alone, through his own Al Qaeda network, in launching the attacks?

IG, al Qaeda, and Hezbollah "the most formidable terrorist coalition in history." It was likely al Qaeda had received assistance from Iran and Hezbollah on the road to 9/11.
See Here: http://iranvajahan.net/cgi-bin/news.pl?l=en&y=2007&m=10&d=12&a=3