September 11 Live Blog

US President Barack Obama gave a speech to close out major US memorials to the attacks of 9/11, 2001.

These are some of his quotes:

"Today it is worth remembering what has not changed: Our character as a nation has not changed... Our faith in god and in each other, that has not changed... Our belief in America, born of a timeless ideal, that men and women should govern themselves, that all people are created equal [has not changed].

"These past 10 years have shown that America does not give in to fear... These past 10 years have shown America's resolve to defend its citizens and our way of life.

"Two million Americans have gone to war since 9/11... Too many will never come home. Those that do carry dark memories from distant places and the legacy of fallen friends.

"These 10 years have shown that we hold fast to our freedoms.

"Debates about war and peace, about security and civil liberties, have often been fierce over these last 10 years.

"These past 10 years tell a story of our resilience.

"Nothing can break the will of a truly united America... We have overcome slavery and civil war, bread lines and fascism, recession and riots, communism and, yes, terrorism.

"May god bless the memory of those we lost, and may god bless the United States of America."

According to the AP news agency, the Secret Service is investigating three threatening messages that were posted on the White House's Facebook page that reportedly included a picture of Osama bin Laden.

One said, "We'll come back 11/9/2011 to kill u all." Another showed small plane icons and said, "Today we'll come 11/9/2011."

Secret Service spokesman Ed Donovan says the agency has referred the messages to its internet threat desk.

Donovan says the Secret Service has a process in place to handle the wide spectrum of internet threats, social media posts and tweets brought to the attention of officials. The messages were first reported by WNBC in New York.

A few facts to recall from September 11, 2001:

The fires where the Twin Towers fell burned for 99 days.

1.5 million tonnes of debris from the towers were removed from the site.

Citizens from more than 90 countries died in the World Trade Center attacks.

The towers collapsed within an hour of each other, and 2,753 died at the WTC.