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FRAGMENTS of the Twin Towers were secretly carried to Mars in a tribute to victims of the attacks.

Engineers used twisted aluminium to make parts for two rovers that landed there in 2004.

Nasa’s Steve Kondon came up with the idea and New York’s then mayor Rudy Giuliani sent debris to Honeybee Robotics, of Manhattan, as it worked on the project.

Honeybee boss Stephen Gorevan said: “It’s gratifying knowing that a piece of the World Trade Center is on Mars.

“It contrasts the destructive nature of the attackers with the ingenuity and hope of Americans.”