Why did the United States attack taliban troops and al qaeda training bases in Afghanistan

After the September 11, 2001 attacks, the United States together with the United Kingdom, launched Operation Enduring Freedom in a war against terrorism. Their goals were to break up the al-Qaeda and to take away their operations base by toppling the Taliban. Afghanistan had long been controlled by the Taliban and it had allowed al-Qaeda, a militant organization founded by Osama bin Laden to operate their training camps in Afghanistan.