On the 14th anniversary of the worst terrorist attack on U.S. soil, tributes are pouring in on social media with an especially moving hashtag.
Accompanying photos, news and memories from the day — and memories of the 2,977 loved ones lost in the tragedy — people and organizations are adding #neverforget to their posts on Facebook, Twitter, Instagram and other social platforms.
Whether it accompanies a memory of the two iconic buildings long gone or first responders who lost their lives or victims who left messages for loved ones while still aboard hijacked planes, #neverforget unites a cascade of imagery and condolences from people all over the world.
In addition to online tributes, there were several events that took place today to mark the anniversary.
At Ground Zero, visitors observed moments of silence, listened to the music of bagpipers and drummers and listened as all of the victims' names were read aloud.
President Barack Obama and first lady Michelle Obama observed a moment of silence on the South Lawn of the White House this morning at 8:46 a.m. ET, the time the first plane hit the World Trade Center.
About 9:30 a.m. ET, a memorial took place at the Pentagon, where another plane struck on Sept. 11, 2001.
And in a field near Shanksville, Pennsylvania, relatives of victims gathered for a memorial where the names of the 40 victims on United Airlines Flight 93 were read.