'A reminder of what I lost': Americans mark 21st anniversary of 9/11 - Sky News
- 'A reminder of what I lost': Americans mark 21st anniversary of 9/11 Sky News
- US marks 21st anniversary of 9/11 terror attacks The Independent
- Families keep memory of 9/11 victims alive Reuters
- 9/11 terror attacks reverberate as US marks 21st anniversary The Associated Press
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