Twin Towers recreated by 2,977 drones in NY in honour of each 9/11 victim

As part of the tributes marking the 25th anniversary of the 9/11 terror attacks, 2,977 drones recreated the Twin Towers at New York Harbour. The number of drones was in honour of each person who died in one of the biggest terrorist attacks. Video showed the drones first spiralling upwards before forming outline of the destroyed World Trade Centre towers.