It was an accident, not terrorism, but this week's helicopter crash on the roof of a midtown Manhattan skyscraper has raised serious security concerns.
A New York City college student accused of plotting a terrorist attack on Times Square spent months trying to stockpile guns and grenades,
NYC Mayor de Blasio apologized for a botched memorial to the bike-path terror attack victims - admitting the event had been put together at the last minute.
New York City's subway system: A 24-hour-a-day operation with 472 stations and more than 5 million daily riders. And, it's vulnerable to terror attacks.
Under the watchful eye of an extremely heavy police presence, crowds of spectators turned out Sunday to cheer on the runners taking part in the New York City Marathon just days after a truck attack killed eight people in lower Manhattan.
Report: Sayfullo Saipov was radicalized while living in the U.S.; New York Governor Andrew Cuomo said there is no evidence to suggest a wider terror plot.
A white racist accused of fatally stabbing a 66-year-old stranger because he was black says he'd intended it as "a practice run."
We've seen terror attacks on American soil over the years, but what are the top-5 terror attacks that occurred in the U.S. that remain unsolved?
Security was stepped up throughout New York City on Tuesday after terror attacks at the airport and subway system in the Belgian capital of Brussels.