9/11, 25 years on: 'A time for reflection about the way the world has gone'

Twenty-five years after the ​deadliest attack on US soil, Americans will pause on Friday to commemorate the nearly 3,000 people killed when hijacked planes slammed into the World Trade Center, the Pentagon and a field in Pennsylvania. But it is also a moment for the global community to reflect on the legacy of September 11 and the world has changed…