What separates us from the animals, what separates us from the chaos, is our ability to mourn people we’ve never met.”

– Author David Levithan#September11 #TwinTowers #United93 pic.twitter.com/jRygh2ixec

— Dr. Jennifer Cassidy (@OxfordDiplomat) September 10, 2021

“No day shall erase you from the memory of time.” #September11 pic.twitter.com/2T2BAMMuM1

— Dori Toribio (@DoriToribio) September 10, 2021

20 years after September 11, 2001, we commemorate the 2,977 lives we lost and honor those who risked and gave their lives. As we saw in the days that followed, unity is our greatest strength. It’s what makes us who we are — and we can’t forget that. pic.twitter.com/WysK8m3LAb

— President Biden (@POTUS) September 10, 2021

⚡️ “A timeline of the September 11, 2001, attacks” https://t.co/iW26noxv7n

— Reuters (@Reuters) September 10, 2021

📸: The “Tower of Light,” a beam of light that pays tribute to those killed during the September 11 attacks at the Pentagon, illuminates the sky over the Pentagon as seen from the Washington Monument on the National Mall in Washington, D.C. https://t.co/SiVyIWkt1L pic.twitter.com/2Z8vLb1lIG

— ABC News (@ABC) September 10, 2021

On September 11, 2001, Flight 93 went down on the barren site of an old strip mine in Pennsylvania. Now a memorial there provides “a useful metaphor for healing,” @williams_paige writes. https://t.co/Hp7mCbnmmU

— The New Yorker (@NewYorker) September 10, 2021

Dear friends: 20 years later, I returned to #GroundZero, where I had worked as a chaplain, along with my Jesuit brothers after #September11. There we ministered to rescue workers and celebrated Mass. Reflections on those days at the World Trade Center. https://t.co/bkHzhq3MVp

— James Martin, SJ (@JamesMartinSJ) September 9, 2021

On September 11, 2001, the only blue light flickering was from the television screen, and all eyes were on it.@gzeromedia's @TonyMaciulis reflects on how media has changed since 9/11:https://t.co/mySwbnMkaY

— ian bremmer (@ianbremmer) September 10, 2021

"A city of fear." AP's Kathy Gannon recounts her time reporting from Kabul, Afghanistan, in the days and weeks from the 9/11 attacks to the U.S. invasion. Gannon's account is excerpted from the book “September 11: The 9/11 Story, Aftermath and Legacy.” https://t.co/LKr7h1E6nA

— The Associated Press (@AP) September 10, 2021

Front pages, 20 years ago. #NeverForget911 #September11 pic.twitter.com/WcdgDVt1yI

— Nico Maounis (@nicomaounis) September 10, 2021

Rereading editorials in @thenation written the day after 9/11 always leaves me in awe of how clear and correct the editors were from the very beginning. https://t.co/TmRyMCnYCl pic.twitter.com/yUgSwh79cA

— Annie Shields (@anastasiakeeley) September 10, 2021

The US has killed more than 363,000 civilians in the wars after #September11, yet calls to #NeverForget rarely seem to include these innocents lost. It's no accident: the military has dodged transparency at every turn. Inside the 20-year casualty cover-up.https://t.co/AOQrFMg0Cz

— Josh Marcus ✌🏻 (@joshwmarcus) September 9, 2021