9/11 lung disease study

Dr. Anna Nolan and her team at NYU School of Medicine looked at blood samples from some New York City firefighters who were exposed to the toxic dust at ground zero on September 11, 2001, and beyond. They found that some firefighters developed lung disease and some did not.

Retired cop's toughest battle

Retired NYPD Police Officer Scott Blackshaw spent 20 years on the force and more than 100 hours working the Ground Zero pile after September 11. Now he spends two to three days a week getting holistic infusions as he fights his toughest battle yet. He was diagnosed with brain and spinal cancer in February.

Sept. 11 lawsuit

A judge who previously rejected arguments that Saudi Arabia was behind the Sept. 11 attacks has expressed doubts again after claims were revived by congressional action. Manhattan federal Judge George B. Daniels questioned lawyers for families and survivors of the 2001 attacks as well as Saudi Arabia during a hearing Thursday.

9/11 responder fights for help

The pictures hanging on his wall show the story of a hero. But 16 years after the day that shook our nation to its core, September 11 first responder Marvin Bethea is still fighting to ensure he is treated as one. Bethea has been in an 11-year battle with the Justice Department to be awarded the Public Safety Officers' Benefit. The act provides a disability benefit to those who have been permanently disabled as the direct result of injury sustained in the line of duty that prevents the officer from performing any gainful work.

More 9/11-related cancers?

Michele Lent Hirsch, 32, believes that her thyroid cancer, diagnosed in 2010, traces back to her days as a student at Stuyvesant High School right after September 11, 2001. In fact, several students from Stuyvesant and from other schools that were near ground zero are now battling various cancers and lung diseases.

9/11 ceremony at Ground Zero

For the families of those killed on 9/11, time does not heal all wounds. A ceremony was held at ground zero 16 years after the attacks. Bells marked the moments that planes struck each tower and the moment each tower fell. In 16 years, a lot has happened. Lower Manhattan has rebuilt and children of the victims have grown up.

9/11 ceremony in Point Lookout

The Town of Hempstead unveiled a permanent 9/11 memorial in Point Lookout. It is a heartfelt tribute to all of the lives lost. Victims' names are etched on the monument wall. With pencils in hand, friends and family traced over the names of their loved ones.

Cantor Fitzgerald charity day

The trading floor at Cantor Fitzgerald on Monday looked like business as usual but it wasn't. The traders were making money for charity in honor of the hundreds of co-workers they lost on 9/11. Many celebrities came to support this multimillion-dollar effort. Cantor Fitzgerald said 100 percent of the money raised goes to charities picked by the celebrities. But this year a portion is being earmarked for hurricane relief.

Day of service on the Intrepid

Volunteers filled the Intrepid Sea, Air & Space Museum Monday to pack meals for those impacted by hurricanes Harvey and Irma. The event was part of the annual 9/11 Day co-founded by David Paine a year after the September 11, 2001, attacks.

White roses at the 9/11 Memorial

Mark Mikulski doesn't deliver roses for a living. The deliveries he makes are purely out of love. For the last four years, Mark has gone to the 9/11 Memorial in Manhattan with a clipboard of names and a bucket of white roses. He places the roses in the names of victims of the 2001 and 1993 World Trade Center terror attacks to honor their birthdays. CORRECTION: Mikulski is an employee, not a volunteer.

9/11 NYPD hero's family

Police Officer Moira Smith was the only female member of the NYPD killed in the World Trade Center attacks. She died helping survivors escape the south tower as it collapsed. Now her family is facing down her accused killers. Last month, they were among a select group of victims' relatives who traveled to Guantanamo Bay to attend pre-trial hearings for the detainees accused of plotting the attacks.

9/11 Tribute Museum

The 9/11 Tribute Museum opened a permanent exhibit space in Lower Manhattan on Tuesday. The museum has a collection of pictures of those killed on September 11, 2001, as well as personal artifacts left behind in the rubble.

Dad and daughter's tower climb

In grief, in remembrance, in strength, and in love: September 11 has had a profound way of bringing lives together. Julianne Yotov never got to meet Firefighter Stephen Siller. She wasn't even born when the attacks happened on September 11, 2001. But every day on her way to school she passes Squad One, the firehouse where Siller began his final heroic hours that chaotic morning. That day Siller and so many other first responders risked and gave their lives to save others -- without question.

9/11 lawsuit

Hundreds of relatives of those killed on Sept. 11 have sued Saudi Arabia, joining many others who have tried to hold the kingdom responsible for the attacks.