In Pictures: America pauses to reflect on country’s worst terrorist attack

A firefighter places his hand on the names engraved on the September 11 memorial. Picture: AP

People across the United States have paused to remember the victims of 9/11 on the 20th anniversary of the terrorist outrage.

Joe Biden joined former presidents Barack Obama and Bill Clinton at a memorial event in New York City, 20 years to the day since the Twin Towers fell.