People cheered, clapped and held their phones up to record the event as a train rolled to a stop, video footage from the subway station showed.

The Cortlandt stop reopened on Saturday on the Number One line in what The New York Times described as “the last major piece in the city’s quest to rebuild what was lost.”

The station was under the World Trade Centre, whose twin towers collapsed in flames after being struck by airliners commandeered by al-Qaeda militants.

The Metropolitan Transportation Authority began rebuilding the stop in 2015, the Times reported.

The 9/11 attacks claimed nearly 3,000 lives in the United States and led to the launch of deadly, long-running wars in Iraq and Afghanistan – countries that remain plagued by violence and instability to this day.