The first Department of Homeland Security (DHS) secretary said Sunday that the threats from abroad are worse today than what the United States faced immediately following the 9/11 attacks. Tom Ridge, who served as DHS secretary from 2003 to 2005, painted a bleak picture of the dangers posed by groups like the Islamic State in Iraq and Syria (ISIS).

FDNY Firefighter Richard Driscoll is the 200th FDNY member to die of World Trade Center illness, the department announced. He retired from Engine 91 in East Harlem in 2002. Driscoll responded to the attacks on the World Trade Center on September 11, 2001, and worked tirelessly in the rescue and recovery efforts that followed. More.

Salvatore “Sal” Cassano, retired fire commissioner of the New York City Fire Department, will return to the World Trade Center site on Saturday June 20, 2015 as a special guest for the 9/11 Memorial Museum’s Stories & Art program. On Sept. 11, 2001, then a commander, Cassano responded to the World Trade Center and survived the collapse of the North Tower by taking shelter under a fire rig parked nearby. More.

A group of volunteers descended on the 9/11 Postcards Memorial in St. George on Sunday for a clean-up of the venerated Staten Island monument. “This place is so special to so many people,” said Dominick DeRubbio, the executive director of “Friends of Postcards,” which is a group of concerned citizens who lost loved ones as a result of 9/11. More.

A woman who became known as the "Dust Lady" after being captured on camera in the aftermath of the Sept. 11, 2001, attack on New York City has died after a battle with cancer, her brother confirmed to NBC News. Marcy Borders, a 42-year-old from Bayonne, New Jersey, was pictured covered in dust after the World Trade Center was hit by two passenger jets. More.

Workers are putting the final touches on the 9/11 Memorial in Cos Cob, a job that stretched into a longer-than expected process. Nearly 500 people came to the dedication of the monument paying tribute to the 33 victims of the terrorist attacks from Greenwich on the anniversary date. More.

They were children that Tuesday when the world changed. Jessica Murphy was 5 years old on Sept. 11, 2001, a kindergartner at P.S. 183 on Manhattan’s Upper East Side. Rob Pycior was 8 and at home with his mother in Landover, Md., when the phone rang that day. Pycior’s father, stationed at the Pentagon, told them to turn on the TV, and they watched as the second airplane hit the World Trade Center.

Hangar 17 at Kennedy International Airport is large enough to house a Boeing 747. For 14 years, however, it has held something much larger: the morning of Sept. 11, 2001. From the enormous trident-shaped columns that supported the World Trade Center towers to delicate crystal pendant earrings from a Casual Corner store in the shopping concourse. More.