9/11 candle tribute in China
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9/11 anniversary marked across the world

11 September 2011 Last updated at 23:40 BST

More than 90 countries lost citizens in the 9/11 attacks in the US, and ceremonies have been held around the world to mark the 10th anniversary.

But the day also saw some anti-American protests and speeches.

Daniela Ritorto reports.