It’s been more than 15 years since the 9/11 attacks spread a cloud of toxic chemicals and dust across Lower Manhattan, and advocates say that many of the people who were harmed by it still don’t realize how they were affected - or that help is available. More.

Chronic health conditions ranging from cancer to “World Trade Center cough” have been attributed to exposure to dust from the September 11, 2001, attack and collapse of the World Trade Center towers. Biology Professor Ann Marie DiLorenzo and her research team have been determining the impact of that dust on lung cells since 2007. More.

Sometime Tuesday, two days after leaving her East Brainerd home, Marvina Baksh will walk into a courtroom at the U.S. military prison at Guantanamo, Cuba, and come face-to-face with the men the U.S. government says killed her brother. But she says she will have no hatred for them, more than 15 years after the Sept. 11 attacks that killed nearly 3,000 people and shattered her tight-knit family. More.

The White House said Tuesday that the Guantánamo Bay detention center in Cuba will still be open when President Barack Obama leaves office, conceding that a core campaign promise will go unfulfilled. Administration officials had long insisted that the president was continuing to work toward closing the facility even when it became obvious that it would no longer be possible for practical reasons before President-elect Donald Trump takes office Friday. More.

The recent conclusion of Dylann Roof's trial is the latest reminder that homegrown terrorism has become part of the fabric of life in America. This problem shows no signs of fading, yet reveals a threat that is both rarer and more complex than simple explanations suggest. More.

The National September 11 Memorial & Museum at the World Trade Center has finally been able to add five missing portraits of people who died on Sept. 11, 2001. This was largely thanks to what Jan Ramirez, senior vice president of collections and chief curator at the Memorial and Museum, calls "a small, wonderful miracle." More.

Katherine Lotspeich was stopped cold by the front page of The New York Times last Sept. 11. She was about to leave her home in Washington, D.C., to teach a Sunday morning yoga class. But she couldn’t take her eyes off a photo depicting a portrait gallery of victims in the National September 11 Memorial & Museum at the World Trade Center. More.

You look at yourself in a mirror; something you might do at least a few times during your day. But this time it’s not just to catch a fleeting casual glance of your reflection. You want to gaze at your face intently to acknowledge that the face looking back at you is that of a 9/11 survivor. This is the face you want to scrutinize; as if for the first time. More.