Charlie Puth and Other Celebrities Share Memories and Messages on 9/11

Singer-songwriter Charlie Puth is one of many celebrities and politicians sharing their memories of the anniversary of the September 11 attacks.

"17 years ago today I wrote this in my diary when I was in 4th grade," he tweeted on Tuesday under the hashtag #NeverForget.

The picture includes a diary entry of an eight year old's handwriting. Some of the note is illegible, but it begins, "Dear Diary, today was a bad day. One of the darkest days in America. The WTC were bombed. 5,000 people died. But we must go on!"

Tuesday marked the 17th anniversary of the attacks. Memorials were held throughout the country, including at New York City's 9/11 Memorial Plaza.

"We will always remember everyone we lost on 9/11, thank the first responders who keep us safe, and honor all who defend our country and the ideals that bind us together," former President Barack Obama tweeted Tuesday. "There's nothing our resilience and resolve can't overcome, and no act of terror can ever change who we are."

Ava Duvernay, director of films such as A Wrinkle in Time and Selma, shared a video of a man giving a memorial speech Tuesday. He asked that people "please stop using the bones and ashes of our loved ones as props in your political theater."

"I actually saw the towers fall from my apartment window that morning," Ice T wrote on Tuesday. "Respect to all the victims and people who lost loved ones."

"17 years ago, the Twin Towers fell. I don't have to pause to remember because I think of it every single day," Bette Midler wrote on Twitter. "Rest In Peace, all who perished and know we have not forgotten."

Many posted photos of the still-standing Twin Towers. Yoko Ono tweeted a video of her and John Lennon gazing at the Towers from the ferry with lyrics of the song "Imagine" preceding the message "Love, John & Yoko." Diddy also posted a photo of rapper and friend Biggie Smalls posing in front of the Twin Towers.

"I rushed to Sam's school to make sure he was safe," wrote Cynthia Nixon, who is running for governor of New York. "Then I went to give blood but was turned away because so many had already donated."

"On this horrific day, we stood up and came together," she continued. "I honor those we lost and the heroes who risked their lives."