9/11 anniversary

Trump on 9/11 anniversary: "Our nation will endure"

He and first lady Melania observed a solemn moment of silence at the White House and later at the Pentagon.

Thousands are gathering nationwide to mark the deadliest attack on US soil.

Nearly 3,000 people died after hijackers crashed planes into New York's World Trade Center, the Pentagon and a rural Pennsylvania field in 2001.

Mr Trump and the first lady observed a moment of silence at the Pentagon at 09:37 (13:37 GMT), when US officials say American Airlines Flight 77 crashed into the building.

9/11 responders show 'staggering' signs of dementia

Around one-third of all World Trade Center (WTC) rescuers — 818 people — were recruited for a new study to analyse how post-traumatic stress disorder (PTSD) may affect their cognitive abilities.

The results were "staggering", said Dr Sean Clouston, one of the research authors.

Approximately 12.8 per cent (104 people) were found to have some cognitive impairment — affecting memory and thinking skills — and 1.2 per cent (10 people) had probable dementia.

The researchers were particularly shocked as the average age of responders was 53.