Among New York City survivors of the September 11, 2001, terrorist attacks, one-fifth have experienced depression since 2011, and depression was more common among participants who had symptoms of posttraumatic stress disorder (PTSD), according to the results of a recent study published in the Journal of Affective Disorders. More.

A special exhibit marking the 25th anniversary of the 1993 truck bombing of the World Trade Center will open Feb. 1 at the National 9/11 Memorial and Museum. The installation in downtown Manhattan is part of a month-long series of commemorative events and will feature artifacts from the attack and subsequent investigation. More.

The National September 11 Memorial & Museum on Friday announced the opening of a special installation to commemorate the 25th anniversary of the 1993 truck bombing of the World Trade Center. The museum said the installation is part of a monthlong series of events marking the deadly attack that killed six people and injured more than 1,000 others. More.

A recent observational study showed that extrathoracic disease has a high incidence in World Trade Center firefighters who developed sarcoidosis following the 9/11 attack in the United States. The study, “Clinical Course of Sarcoidosis in World Trade Center-Exposed Firefighters,” was published in the journal Chest. More.

Social media companies are making significant strides in weeding out content from extremists and bad actors from their sites, but without significant policy changes, “authoritarians and terrorists” will continue using the platforms to threaten the American public, said one national security expert. More.

New York Law School is offering free clinics for individuals who need assistance filing a claim with the September 11th Victim Compensation Fund, but do not wish to hire an attorney. Clinics are January 26 and 30 and are by appointment only. Pre-registration is required with limited space available. More.