The video footage of the moment the second plane hits the World Trade Center can still shock, even though we've seen it so many times.

And here, below the surface of the World Trade Center, the memory of Sept. 11, 2001, lives on. Vividly. Painfully. More.

Tucked inside the National September 11 Memorial Museum is a video recording booth. Here, the museum, which opens next week, hopes to gather the voices of visitors, reflecting on how the terrorist attacks affected their lives, and how the world has changed since that day.

At 7am on Saturday morning, May 10, I watched one of the tiniest, quietest, least gregarious and yet most poignant processions I've ever seen, at Ground Zero, New York.

Police motorcycle outriders guided a trio of vehicles each containing one of three caskets. More.

After a decade marked by deep grief, partisan rancor, war, financial boondoggles and inundation from Hurricane Sandy, the National September 11 Memorial Museum at ground zero is finally opening ceremonially on Thursday, with President Obama present, and officially to the public next Wednesday.

9-11 doesn't need a year date, 2001. 9-11 is one of those dates -- at least in the American mind -- that lives in a category named "inconceivable." It's a date when the twin towers of American mythology -- invincibility and transparency -- came crashing down.

We are now more than a dozen years in front of that day, but 9-11 is still with us: perhaps a bit submerged in our consciousness, but no less potent than it was on that beautiful NYC morning.

Volunteers with Maine's Red Cross chapter will be heading to New York to provide mental health support for families viewing the new 9/11 Memorial Museum.

The museum is opening one week early for those directly impacted by the events of September 11th. More.

Michael Bloomberg was an unlikely savior of the museum that honors the victims of the Sept. 11, 2001, attacks - a project stalled for years in a morass of debate among family members, urban planners and politicians.

Muslim advocates and scholars are stepping up pressure on the Sept. 11 museum to edit or at least let more scholars see a documentary movie exhibit about al-Qaida before the museum's opening this month.

Muslim groups began expressing concerns after members of the museum's interfaith clergy advisory panel raised alarms last month that the movie unfairly links Islam and terrorism. One member resigned in protest. More.