Thousands of people will gather in New York City, Washington DC, and Shanksville, Pennsylvania on Wednesday (September 11) to remember the nearly 3,000 people killed when hijacked jetliners crashed into the World Trade Center, the Pentagon, and a field in Pennsylvania on September 11, 2001.
Annual reading of victims' names
In New York City, a ceremony will take place at the 9/11 Memorial, where mourners gather as they have every year since the attack, for the annual reading of victims' names from both the 1993 and 2001 attacks on the World Trade Center.
They will also observe a citywide moment of silence at 8:46am, the time American Airlines Flight 11 crashed into the North Tower, with a second pause at 9:03am when United Airlines Flight 175 struck the South Tower.
(Picture shows the rooftop as the 'Tribute in Light' illuminates the night sky, on September 10, 2017 in New York City, on the eve of the anniversary of the September 11, 2001 terror attacks.)
Moments of silence
Further moments of silence will be observed at 9:37am, when American Airlines Flight 77 hit the Pentagon; at 9:59am when the South Tower fell; at 10:03 a.m. when United Flight 93 hit the ground near Shanksville, Pennsylvania; and at 10:28 am, when the North Tower collapsed.
Series of four coordinated terrorist attacks
The September 11 attacks were a series of four coordinated terrorist attacks by the Islamic terrorist group Al-Qaeda against the United States on September 11, 2001.
Osama bin Laden and Al Qaeda
Osama bin Laden and Al Qaeda claimed responsibility for the suicide attacks and a US-led war in Afghanistan followed.
US forces killed bin Laden in May 2011 in a surprise raid on his hideout in Abbottabad, Pakistan, ending a nearly 10-year hunt for the Al Qaeda leader.
(Photograph:Zee News Network)
Aftereffects of the attack; nearly 10,000 diagnosed with cancer
In addition to those killed on September 11, thousands of first responders, construction workers and residents have since developed illness, many of them terminal, as a result of inhaling the toxic fumes.
Nearly 10,000 people in the United States are diagnosed with cancer linked to the smoke and polluted dust resulting from the September 11 Twin Tower terrorist attack in the New York City, media reports said.
(In picture: Jaquelin Febrillet, 44, of Manhattan, was diagnosed recently with metastatic breast cancer after having been engulfed in the cloud of ashes and debris from the falling towers on 9/11.)