Since911.com says that Al-Qaeda begun to plan for the 9/11 attacks in 1998- about three years prior to the actual attacks. since911.com/sites/default/… #911tragedyrip

The response to 9/11 (fighting Al-Qaeda terrorism in Afghanistan) was said to define George W. Bush’s presidency, according to history.com. history.com/topics/9-11-at… #911tragedyrip

The Pentagon wreckage after the third plane hit the southwest side.

The plane that first hit the north tower of the World Trade Center was a plane from American Airlines, more specifically a Boeing 767. It was carrying 20,000 gallons of jet gasoline, according to history.com. history.com/topics/9-11-at… #911tragedyrip

After the terrorist attacks on September 11th, 2001, Russia donated a monument to the United States to remember the lives of all those lost in the attacks. The "Teardrop Memorial" as it is titled, stands in Harbor View Park, New Jersey. #911tragedyrip

Debris from United Airlines Flight 93 was strewn across a Pennsylvania field, as in a brave attempt by passengers to take back control of the plane from the hijackers, the plane struck the ground with serious force. #911tragedyrip

The North and South Towers of the World Trade Center were both 110 stories tall, and during the 9/11 attacks, the 93rd-99th stories of the North tower were hit, and the 75th-85th stories of the South Tower were hit. #911tragedyrip

At 9:08am September 11, 2001, all aircraft in America were banned from taking off, and at 9:42am, for the first time in the FAA's history, all flights currently in the air were directed to the closest airport to land. #911tragedyrip

After the 9/11 attacks, a temporary public memorial for the victims of the attacks was established, called "Tribute in Lights". The memorial is made from 88 xenon spotlights. #911tragedyrip

On what is known as Ground Zero, a skyscraper memorializing the Twin Towers was constructed, known as World Trade Center One. #911tragedyrip

On September 11, 2001, over 343 firefighters were killed in New York City, the deadliest day in history for the force. #911tragedyrip