Apple US's homepage is dedicated to those affected by Tuesday's terrorist attack on the World Trade Center and the Pentagon.
The tribute reads: "Our thoughts are dedicated to those who were affected by the tragic events this week."
Beneath that is another message compelling readers to contact the American Red Cross.
There will be a three-minute silence today at 11am (BST) to commemorate Tuesday's tragic events. As the UK remembers those who lost their lives, the search is underway for the perpetrators of the terrorist attacks.