Reading Time: 1 minutes

A fireball erupts in the South Tower of the World Trade Center after the Islamic terrorist group Al-Qaeda hijacked four passenger airliners, two of which were flown directly into the World Trade Center (Credit: Robert J Fisch via Flickr)

A fireball erupts in the South Tower of the World Trade Center after the Islamic terrorist group Al-Qaeda hijacked four passenger airliners, two of which were flown directly into the World Trade Center (Credit: Robert J Fisch via Flickr)