(NBC News) -- A pause by the nation this morning, just like it has the last 12-years, to remember those killed in the terror attacks in New York, Washington and rural Pennsylvania.
For 12 years their names have echoed from the place where they were lost.
Mourners pause for a moment at the exact times the planes hit and the towers fell.
But don't mistake the silence.
"As long as there are those who would strike our citizens, we will stand vigilant and defend our nation," said President Obama.
Those who gather today at the Pentagon and in a field in rural Pennsylvania are sending a loud message of strength and survival.
"Its important for me for people to know about Glenn's bravery and the way he lived his life," said Jay Winuk whose brother, Glenn died on 9-11.
And the heroic way Glenn, a lawyer and volunteer fire fighter died.
"He is a true American hero he had the skills and the guts and the where with all to run into a towering inferno," Winuk said.
Winuk's story is one of so many that will be told in the 9-11 museum, which will open early next year.
It's being built around the twisted metal, battered foundation and other remnants on the original World Trade Center site.
"It symbolizes in a sense we are all survivors of 9-11," said Joe Daniels, President of the National 9/11 Memorial and Museum.
The 9/11 museum, and One World Trade or Freedom Tower are schedule to open early next year.
-- Jay Gray, NBC News, reports