9/11 anniversary: Joe Biden calls for unity as US marks 20 years – video

Joe Biden has called for unity as the US remembers the 2,977 people who lost their lives in the 9/11 攻击. ‘We honour all those who risked and gave their lives in the minutes, 小时, months and years afterwards,’ he said. 拜登 is due this morning to join families of the victims at three separate locations. But anger at the US president’s recent botched withdrawal from Afghanistan is still raw