BBC Breakfast News: 20th anniversary of 9/11

President Biden leads a day of events in New York, 20 years to the day after a pair of hijacked airliners destroyed the World Trade Center towers, forever changing America. Nearly 3,000 people were killed on Sept. 11, 2001, sparking 'war on terrorism', rewriting the rules on security and surveillance in the U.S. and creating costly and unwinnable wars in both Afghanistan and Iraq.