Around the country, some communities have canceled September 11 commemorations because of the pandemic, while others are going ahead, sometimes with modifications.
The New York memorial is changing one of its ceremony's central traditions: having relatives read the names of the dead, often adding poignant tributes. Thousands of family members are still invited.
But they'll hear a recording of the names from speakers spread around the vast plaza, a plan that memorial leaders felt would avoid close contact at a stage but still allow families to remember their loved ones at the place where they died.
But some victims' relatives felt the change robbed the observance of its emotional impact.
A different 9/11-related group, the Stephen Siller Tunnel to Towers Foundation, set up its own, simultaneous ceremony a few blocks away, saying there's no reason that people can't recite names while keeping a safe distance.
The two organizations also tussled over the Tribute in Light, a pair of powerful beams that shine into the night sky near the trade center and evoke its fallen twin towers.
The September 11 memorial initially canceled the display, citing virus-safety concerns for the installation crew.
After the Tunnel to Towers Foundation vowed to put up the lights instead, the memorial changed course with help from its chairman, former Mayor Mike Bloomberg, and Gov. Andrew Cuomo.
Tunnel to Towers, meanwhile, arranged to display single beams for the first time at the Shanksville memorial and the Pentagon.