1) Four flights were hijacked. Two crashed into the World Trade Center towers, one crashed into the Pentagon, and one was going for an undisclosed target, but ended up crashing into a field in Pennsylvania. Over 2,000 lives were lost.
2) The War on Terrorism began which is still going on to this day. Airlines now have more security measures, the 24 hour news cycle began, and the Patriot Act was enacted.
3) First responders are dealing with mental and physical health issues from responding to the attacks. They have trauma from what they saw when responding, and have been getting illnesses like cancer from all the dust and asbestos at the attack sites. The death toll from the attacks is still rising due to this
