Today is the 17th anniversary of the 9/11 attacks. These pictures show the moments of grieving, unity, and action during the weeks that followed.
Gabriel H. Sanchez
Posted on September 11, 2018, at 12:11 p.m. ET
The rubble of the World Trade Center smolders following the Sept. 11 terrorist attack in New York City.
New York City firefighters carry the casket of Capt. Terence Hatton at St. Patrick's Cathedral in New York City on Oct. 4, 2001.
Firefighter Tony James cries while attending the funeral service for FDNY chaplain Mychal Judge on Sept. 15, 2001, in New York City.
A helmet and flower sit atop a rack at New York City's Engine Co. 55 firehouse on Oct. 3, 2001.
People cover themselves with an American flag on the US Capitol grounds during a candlelight vigil on Sept. 12, 2001, in Washington, DC.
A group of women attends a vigil on Sept. 13, 2001, in Pasadena, California.
Flowers and tributes are left in New York City's Union Square on Sept. 12, 2001.
Two women display a photo of a relative on Oct. 28, 2001, during the World Trade Center Family Memorial Service in New York.
An aerial view shows the World Trade Center site on Sept. 23, 2001, in New York City. A commemorative US flag and a "We will never forget" banner were hung by rescue workers at the rubble-strewn World Financial Center.
A firefighter is arrested during a rally near the World Trade Center on Nov. 2, 2001. Several hundred firefighters rallied against the mayor's plan to scale back the role of the city's fire department in the recovery effort.
A medical center in Boston collects blood for transfusions on Sept. 12, 2001.
A board for missing people is set up outside the New York City Armory on Sept. 15, 2001.
A woman searching for her daughter, a clerical worker at the World Trade Center, faints in grief on Sept. 14, 2001, as she realizes the number of missing people from the posters that surround the nearest hospital in downtown Manhattan.
A schoolchild's letter, featuring a drawing of planes striking the World Trade Center, is left at a memorial in Lower Manhattan on Sept. 15, 2001.
A man watches a CNN broadcast of the Osama bin Laden tape, which had just been released by the Pentagon, on Dec. 13, 2001, in a New York City store. The Bush administration called the tape the "smoking gun" that proves bin Laden's direct responsibility for the Sept. 11 attacks.
A woman holds up a sign in support of rescue workers who arrive and depart from the collapsed World Trade Center on Oct. 2, 2001.
A security officer and his guard dog watch over Wall Street on Oct. 1, 2001, in New York City.
Lanny McAndrew, the chief pilot for JetBlue Airways, stands behind one of the new bulletproof cockpit doors that have been installed on all JetBlue planes since the 9/11 attacks, on Oct. 17, 2001.
Two federal air marshals engage in a live-fire, tactical handgun training exercise at the FAA Technical Center in Pomona, New Jersey.
A jet takes off from the flight deck of the aircraft carrier USS Enterprise in the Arabian Sea on Oct. 11, 2001. The USS Enterprise was one of the many ships involved in the attacks on Afghanistan following the terrorist attacks.
Catherine Lengel sews together an American flag on Oct. 2, 2001, at the Valley Forge Flag Company in Womelsdorf, Pennsylvania.
Rapper P. Diddy performs at the "United We Stand" concert in Washington, DC, on Oct. 21, 2001.
Workers paint the World Trade Center and an American flag onto the front of a restaurant on Staten Island, on Sept. 12, 2001.
Peace marchers gather before the US Capitol on Sept. 29, 2001. Thousands of anti-war demonstrators marched in Washington to protest possible US military action in response to the terrorist attacks.
Anti-war demonstrators hold a rally at Union Square, New York City, on Sept. 22, 2001, to pay tribute to those missing in the terrorist attacks and to protest the possible military response by the US.
A vendor displays a "Wanted: Dead or Alive" T-shirt picturing Osama bin Laden at his booth at the Mall of America on Oct. 1, 2001.
Flags and signs are displayed on Sept. 13, 2001, at a construction site near Times Square.
A woman writes a message in chalk in New York's Union Square on Sept. 14, 2001, at a memorial for the victims of the World Trade Center attack.
Gabriel H. Sanchez is the photo essay editor for BuzzFeed News and is based in New York City.
Contact Gabriel H. Sanchez at firstname.lastname@example.org.
Got a confidential tip? Submit it here.