Police surveillance is more invasive and more mysterious than ever - Vox
IBM Used NYPD Footage to Develop Skin Color Video Search
Photos Show Surprising Number of Security Cameras on NYC Daily Commute
New York to install surveillance cameras in every subway car
How Thousands of Volunteers & Amnesty International Mapped New York's 15,000 Police Surveillance Cameras - Global Investigative Journalism Network
Security Camera Laws in New York: Frequently Asked Questions
MTA Report Says Just Over One Third of Stations Have Cameras
Surveillance city: NYPD can use more than 15,000 cameras to track people using facial recognition in Manhattan, Bronx and Brooklyn - Amnesty International