US CITIZENSHIP TEST PREPARATION

Detailed explanation-1: -The September 11 attacks, commonly known as 9/11, were four coordinated suicide terrorist attacks carried out by the militant Islamist extremist network al-Qaeda against the United States on September 11, 2001.

Detailed explanation-2: -On September 11, 2001, nineteen terrorists who were members of al-Qaeda, an Islamist extremist network, hijacked four commercial airplanes. In a coordinated attack, the hijackers intentionally flew two of the planes into the Twin Towers of the World Trade Center, and a third into the Pentagon.

Detailed explanation-3: -2001 – The September 11 attacks, a series of coordinated terrorist attacks killing 2, 996 people using four aircraft hijacked by 19 members of al-Qaeda.

Detailed explanation-4: -On September 9, 2001, Russian President Vladimir Putin called his American counterpart George W. Bush with an urgent message: Ahmad Shah Massoud, leader of the anti-Taliban and Moscow-supported Northern Alliance, had been assassinated in Afghanistan by two suicide bombers posing as journalists.

Detailed explanation-5: -The United States responded to the attacks by launching the War on Terror and invading Afghanistan to depose the Taliban, which had harbored al-Qaeda. Many countries strengthened their anti-terrorism legislation and expanded law enforcement powers.