Kim Kardashian has recalled the moment she found out about 9/11 in an emotional tribute posted on Instagram.
The mom uploaded a picture of Manhattan without the twin towers, but a reflection of them in the Hudson River, with the word "reflect."
Kim was one of the countless celebrities who posted moving tributes online.
Reese Witherspoon said,
Sarah Jessica Parker wrote a simple message to all the families, New Yorkers and others affected by the tragedy, saying "I recall and grieve with you."
Services were held across the world to mark the 15th anniversary of 9/11.
President Obama led a moment of silence at the White House at 8:46 am. The day before, he said,