Holding photos and reading names of loved ones lost 16 years ago, 9/11 victims' relatives marked the anniversary of the attacks at ground zero on Monday with a solemn and personal ceremony.
"I know you're looking down at me with a big, big smile on your face," Connor Murphy said through tears. He lost his father, Kevin James Murphy.
Sixteen years later, the quiet rhythms of commemoration have become customs: a recitation of all the names of the dead, moments of silence and tolling bells, and two powerful light beams that shine through the night.
Yet each ceremony also takes on personal touches. Over the years, some name-readers have added messages ranging from the universal ("the things we think separate us really don't — we're all part of this one Earth") to the personal ("I love you and miss you. Go Packers!").
The victims died when hijacked planes slammed into the trade center, the Pentagon and a field near Shanksville, Pennsylvania, on Sept. 11, 2001, hurling America into a new consciousness of the threat of global terrorism.
President Donald Trump, a native New Yorker observing the anniversary for the first time as the nation's leader, observed a moment of silence at the White House with first lady Melania Trump.
The Trumps bowed their heads and placed their hands over their hearts as "Taps" was played on the South Lawn during the somber ceremony with White House aides and other administration officials.
The morning remembrance was held at 8:46 a.m., the time the first plane struck one of the Twin Towers on the morning of Sept. 11, 2001.
Trump and his wife were also paying their respects at a Pentagon ceremony led by Defense Secretary Jim Mattis and Gen. Joseph Dunford, chairman of the Joint Chiefs of Staff. The observances come as the U.S. grapples with the death and destruction caused by two hurricanes in three weeks.
Vice President Mike Pence and U.S. Secretary of the Interior Ryan Zinke are scheduled to deliver remarks at the Flight 93 National Memorial near Shanksville. It's on the rural field where one of the airliners crashed after passengers and crew fought to wrest control away from the terrorists who'd hijacked it and were heading for Washington.
Construction continues at the Shanksville memorial, where ground was broken Sunday for a 93-foot (28 meters) tall Tower of Voices to honor the 33 passengers and seven crew members who died.
The ceremony amid the waterfall pools and lines of trees on the National Sept. 11 Memorial plaza strives to be apolitical: Politicians can attend, but since 2011, they haven't been allowed to read names or deliver remarks.
Yet last year's 15th-anniversary ceremony became entangled in the narrative of a fractious presidential campaign when Democratic nominee Hillary Clinton left abruptly, stumbled into a van and ultimately revealed she'd been diagnosed days earlier with pneumonia.
The episode fed into questions that then-Republican-nominee Trump had repeatedly raised about Clinton's stamina and transparency. She took three days off to recover, and Trump used footage of her stagger in a campaign ad.
Trump has often invoked his memories of 9/11 to highlight his hometown's resilience and responders' bravery. Some of his recollections have raised eyebrows, particularly remarks while talking about Muslims that "thousands of people were cheering" in Jersey City, New Jersey, as the towers fell. There is no evidence in news archives of mass celebrations by Muslims there.
Trump often lauds the bravery of New York police officers, firefighters and other emergency responders who rushed to the Twin Towers, in some cases knowing they probably wouldn't make it out alive, as an example of the resilience of the city where he made a name for himself.
Trump has also said he lost "hundreds of friends" in the attack and that he helped clear rubble afterward. Trump has not provided the names of those he knew who perished in the attack, but has mentioned knowing a Catholic priest who died while serving as a chaplain to the city's fire department.
But Trump has criticized President George W. Bush's handling of the attacks, accusing his fellow Republican of failing to keep Americans safe.
Meanwhile, rebuilding and reimagining continues at ground zero. The third of four planned office towers is set to open next year; so is a Greek Orthodox church, next to the trade center site, that was crushed by the South Tower's collapse. Work toward a $250 million performing arts center continues after a design was unveiled last fall.
Most recently, plans were announced this spring to transform a grassy clearing on the memorial plaza into a walkway and area dedicated to 9/11 rescue and recovery workers, including those who died of illnesses years after being exposed to smoke, dust and ash at ground zero.