Lady Gaga, Taylor Swift and Jessica Chastain are among the stars who have taken to the Internet to mark 13 years since the terrorist atrocities of 9/11.
New York City was devastated by the attacks on the World Trade Center and the Pentagon on 11 September, 2001, which - along with a downed airliner in Pennsylvania on the same day - claimed almost 3,000 lives.
Some of the world's biggest stars joined together on Thursday (11Sep14) to mark 13 years since the horrifying events, with pop superstar Lady Gaga writing in a post on her Twitter.com page, "Today we remember and honour all the lives + families ruined by the tragedy of 9/11. Practice love in their memory today #WeWillNeverForget (sic)."
Fellow singer Taylor Swift reveals she recently visited the 9/11 memorial site in New York City and it had a profound effect on her: "Visiting the @Sept11Memorial this year was something I'll never forget, in memory of a day we will always remember with tears in our eyes."
Hollywood actress Chastain urged fans to visit the 9/11 memorial museum in the Big Apple, tweeting, "Today the 9/11 museum is open to the public. We remember the lives that were lost this day 13 years ago."
LeAnn Rimes simply writes, "September 11 #NeverForget #September11 (sic)," while actor Gary Sinise adds, "Remembering all those lost in terrorist attack 13 years ago, and remembering with gratitude all who have stepped up to serve. Never Forget."
Other tributes have come in from singer Chris Brown, hip-hop stars Missy Elliott and Queen Latifah, music mogul Russell Simmons, rocker Bret Michaels, and John Stamos, Alyssa Milano, Gabrielle Union and singer Chely Wright.