Finley, three, runs among the 'Waves of Flags' installation at the Pepperdine University in Malibu, California. EPA
Retired Willow Springs, Illinois Chief of Police Sam Pulia and his nephew, Chicago Police Sgt Daniel Pulia, place flags at the South Tower ahead of ceremonies to mark the 20th anniversary of the 9/11 attacks. EPA
People visit the 9/11 memorial on the 20th anniversary of the September 11 attacks in Manhattan, New York. EPA
A woman places flowers on the 9/11 memorial. EPA
A man takes a moment to remember those who lost their lives in the attacks. EPA
A woman places flowers at the South Tower ahead of ceremonies to mark the 20th anniversary of the 9/11 attacks. EPA
Claudia Castano speaks about her memory of her brother German who's name is etched at the Empty Sky 9/11 Memorial in Liberty State Park in Jersey City, New Jersey. AFP
People mourn at the 9/11 Memorial on the 20th anniversary of the September 11 attacks in Manhattan, New York City, U. S. EPA
Members of the New York Police and Fire Department hold a flag for the national anthem during the annual 9/11 Commemoration Ceremony at the National 9/11 Memorial and Museum in New York City. AFP
Kirsten Gillibrand arrives at a ceremony at Ground Zero held in commemoration of the 20th anniversary of the terrorist attacks on the World Trade Center, the Pentagon and the crash of United Airlines Flight 93 in Shanksville, PA, held in lower Manhattan, New York City.
Police commissioner Dermot Shea arrives at a ceremony at Ground Zero held in commemoration of the 20th anniversary of the terrorist attacks on the World Trade Center, the Pentagon and the crash of United Airlines Flight 93 in Shanksville, PA, held in lower Manhattan, New York. AFP
An American flag placed along with a photo of the Twin Towers and the name Daniel P. Trant, a Cantor Fitzgerald bond trader that died during 9/11, before ceremonies to commemorate the 20th anniversary of the Sept. 11 terrorist attacks at the National September 11 Memorial & Museum in New York. AP
A 9. 11 Memorial staff member places a flag at the South Tower before ceremonies marking the 20th anniversary of the 9. 11 attack at the World Trade Center in New York which killed almost 3,000 people. EPA
A U. S. flag is seen on the 9/11 Memorial on the 20th anniversary of the September 11 attacks in Manhattan, New York City, U. S. EPA
A NYPD Honor Guard marches in with a damaged American Flag at the South Tower before ceremonies marking the 20th anniversary of the 9. 11 attack at the World Trade Center in New York which killed almost 3,000 people. EPA
New York police and firefighters hold a US flag as a band plays the US National Anthem at the National 9/11 Memorial during a ceremony commemorating the 20th anniversary of the 9/11 attacks on the World Trade Center, in New York. AFP
A 9. 11 Memorial staff member places a flag at the South Tower before ceremonies marking the 20th anniversary of the 9. 11 attack at the World Trade Center in New York which killed almost 3,000 people. AFP
Flowers placed at the name of Frank Spinelli at the 9/11 memorial during a ceremony at Ground Zero held in commemoration of the 20th anniversary of the terrorist attacks on the World Trade Center, the Pentagon and the crash of United Airlines Flight 93 in Shanksville, PA, held in lower Manhattan, New York City, NY, USA. EPA
New York police and firefighters hold a US flag as a band plays the US National Anthem at the National 9/11 Memorial during a ceremony commemorating the 20th anniversary of the 9/11 attacks on the World Trade Center, in New York. AFP
A man places American flags on the South Pool of the 9/11 Memorial during a ceremony marking the 20th anniversary of the 11 September 2001 terrorist attacks in New York, New York, USA,. EPA
Family members sit on a bench that honors their loved one at the National 9/11 Pentagon Memorial opened in 2008, that commemorates the lives lost at the Pentagon and onboard American Airlines Flight 77, at the Pentagon in Washington. An American flag was unfurled at the Pentagon at sunrise on the morning of the 20th anniversary of the terrorist attacks and is draped over the site of impact at the Pentagon. AP
A rose lays on a bench at the National 9/11 Pentagon Memorial in Arlington, Virginia. The nation is marking the 20th anniversary of the terror attacks of September 11, 2001, when the terrorist group al-Qaeda flew hijacked airplanes into the World Trade Center, Shanksville, PA and the Pentagon, killing nearly 3,000 people. AFP
US Vice President Kamala Harris and her husband Doug Emhoff make their way to board a flight before departing from Andrews Air Force Base in Maryland . - Vice President Harris is heading to Shanksville, Pennsylvania to attend a 9/11 commemoration. AFP
US Vice President Kamala Harris and her husband Doug Emhoff make their way to board a flight before departing from Andrews Air Force Base in Maryland. - Vice President Harris is heading to Shanksville, Pennsylvania to attend a 9/11 commemoration. AFP
People attend a 9/11 commemoration ceremony at the Greek Orthodox St Nicholas National Shrine adjacent to the 9/11 Memorial and Museum in New York. AFP
People walk among the flags of the commemorative installation 'Waves of Flags' on the eve of the 20th anniversary of 9/11 at the Pepperdine University in Malibu, California. EPA
People sit in front of the 'Tribute in Light' installation in New York, commemorating the 9/11 terrorist attacks. AFP
The annual 'Tribute in Light' marking the the 9/11 attacks on the World Trade Centre shines within lower Manhattan's skyline in New York. AFP
People hold candles in New York as they remember those who lost their lives in the attacks. AFP
People watch the cast of the Broadway musical ‘Come From Away' perform a free concert in front of the Lincoln Memorial in Washington. AFP
On the eve of the 20th anniversary of 9/11, the Friends of Flight 93 host the Luminaria Ceremony at Flight 93 National Memorial Plaza in Shanksville, Pennsylvania. EPA
Sergeant Edwin Morales holds a photo of his cousin, Rubin Correa from Engine 74, by the Tribute in Light installation in New York. Reuters
The Tribute in Light installation and World Trade Centre shine bright at night. Reuters
A candlelight memorial remembers the passengers and crew of United Flight 93 at the Flight 93 National Memorial in Shanksville. AP
A flight attendant reads a card with flowers at the Wall of Names at the Flight 93 National Monument during the Luminaria Ceremony in Shanksville, Pennsylvania. AFP
Finley, three, runs among the 'Waves of Flags' installation at the Pepperdine University in Malibu, California. EPA
Retired Willow Springs, Illinois Chief of Police Sam Pulia and his nephew, Chicago Police Sgt Daniel Pulia, place flags at the South Tower ahead of ceremonies to mark the 20th anniversary of the 9/11 attacks. EPA
People visit the 9/11 memorial on the 20th anniversary of the September 11 attacks in Manhattan, New York. EPA
A woman places flowers on the 9/11 memorial. EPA
A man takes a moment to remember those who lost their lives in the attacks. EPA
A woman places flowers at the South Tower ahead of ceremonies to mark the 20th anniversary of the 9/11 attacks. EPA
Claudia Castano speaks about her memory of her brother German who's name is etched at the Empty Sky 9/11 Memorial in Liberty State Park in Jersey City, New Jersey. AFP
People mourn at the 9/11 Memorial on the 20th anniversary of the September 11 attacks in Manhattan, New York City, U. S. EPA
Members of the New York Police and Fire Department hold a flag for the national anthem during the annual 9/11 Commemoration Ceremony at the National 9/11 Memorial and Museum in New York City. AFP
Kirsten Gillibrand arrives at a ceremony at Ground Zero held in commemoration of the 20th anniversary of the terrorist attacks on the World Trade Center, the Pentagon and the crash of United Airlines Flight 93 in Shanksville, PA, held in lower Manhattan, New York City.
Police commissioner Dermot Shea arrives at a ceremony at Ground Zero held in commemoration of the 20th anniversary of the terrorist attacks on the World Trade Center, the Pentagon and the crash of United Airlines Flight 93 in Shanksville, PA, held in lower Manhattan, New York. AFP
An American flag placed along with a photo of the Twin Towers and the name Daniel P. Trant, a Cantor Fitzgerald bond trader that died during 9/11, before ceremonies to commemorate the 20th anniversary of the Sept. 11 terrorist attacks at the National September 11 Memorial & Museum in New York. AP
A 9. 11 Memorial staff member places a flag at the South Tower before ceremonies marking the 20th anniversary of the 9. 11 attack at the World Trade Center in New York which killed almost 3,000 people. EPA
A U. S. flag is seen on the 9/11 Memorial on the 20th anniversary of the September 11 attacks in Manhattan, New York City, U. S. EPA
A NYPD Honor Guard marches in with a damaged American Flag at the South Tower before ceremonies marking the 20th anniversary of the 9. 11 attack at the World Trade Center in New York which killed almost 3,000 people. EPA
New York police and firefighters hold a US flag as a band plays the US National Anthem at the National 9/11 Memorial during a ceremony commemorating the 20th anniversary of the 9/11 attacks on the World Trade Center, in New York. AFP
A 9. 11 Memorial staff member places a flag at the South Tower before ceremonies marking the 20th anniversary of the 9. 11 attack at the World Trade Center in New York which killed almost 3,000 people. AFP
Flowers placed at the name of Frank Spinelli at the 9/11 memorial during a ceremony at Ground Zero held in commemoration of the 20th anniversary of the terrorist attacks on the World Trade Center, the Pentagon and the crash of United Airlines Flight 93 in Shanksville, PA, held in lower Manhattan, New York City, NY, USA. EPA
New York police and firefighters hold a US flag as a band plays the US National Anthem at the National 9/11 Memorial during a ceremony commemorating the 20th anniversary of the 9/11 attacks on the World Trade Center, in New York. AFP
A man places American flags on the South Pool of the 9/11 Memorial during a ceremony marking the 20th anniversary of the 11 September 2001 terrorist attacks in New York, New York, USA,. EPA
Family members sit on a bench that honors their loved one at the National 9/11 Pentagon Memorial opened in 2008, that commemorates the lives lost at the Pentagon and onboard American Airlines Flight 77, at the Pentagon in Washington. An American flag was unfurled at the Pentagon at sunrise on the morning of the 20th anniversary of the terrorist attacks and is draped over the site of impact at the Pentagon. AP
A rose lays on a bench at the National 9/11 Pentagon Memorial in Arlington, Virginia. The nation is marking the 20th anniversary of the terror attacks of September 11, 2001, when the terrorist group al-Qaeda flew hijacked airplanes into the World Trade Center, Shanksville, PA and the Pentagon, killing nearly 3,000 people. AFP
US Vice President Kamala Harris and her husband Doug Emhoff make their way to board a flight before departing from Andrews Air Force Base in Maryland . - Vice President Harris is heading to Shanksville, Pennsylvania to attend a 9/11 commemoration. AFP
US Vice President Kamala Harris and her husband Doug Emhoff make their way to board a flight before departing from Andrews Air Force Base in Maryland. - Vice President Harris is heading to Shanksville, Pennsylvania to attend a 9/11 commemoration. AFP
People attend a 9/11 commemoration ceremony at the Greek Orthodox St Nicholas National Shrine adjacent to the 9/11 Memorial and Museum in New York. AFP
People walk among the flags of the commemorative installation 'Waves of Flags' on the eve of the 20th anniversary of 9/11 at the Pepperdine University in Malibu, California. EPA
People sit in front of the 'Tribute in Light' installation in New York, commemorating the 9/11 terrorist attacks. AFP
The annual 'Tribute in Light' marking the the 9/11 attacks on the World Trade Centre shines within lower Manhattan's skyline in New York. AFP
People hold candles in New York as they remember those who lost their lives in the attacks. AFP
People watch the cast of the Broadway musical ‘Come From Away' perform a free concert in front of the Lincoln Memorial in Washington. AFP
On the eve of the 20th anniversary of 9/11, the Friends of Flight 93 host the Luminaria Ceremony at Flight 93 National Memorial Plaza in Shanksville, Pennsylvania. EPA
Sergeant Edwin Morales holds a photo of his cousin, Rubin Correa from Engine 74, by the Tribute in Light installation in New York. Reuters
The Tribute in Light installation and World Trade Centre shine bright at night. Reuters
A candlelight memorial remembers the passengers and crew of United Flight 93 at the Flight 93 National Memorial in Shanksville. AP
A flight attendant reads a card with flowers at the Wall of Names at the Flight 93 National Monument during the Luminaria Ceremony in Shanksville, Pennsylvania. AFP
Finley, three, runs among the 'Waves of Flags' installation at the Pepperdine University in Malibu, California. EPA
