A view of a memorial to victims of the Sept. 11, 2001, attacks on the World Trade Center towers was taken on Mars yesterday, on the 10th anniversary of the attacks.
The memorial, made from aluminum recovered from the site of the twin towers in weeks following the attacks, serves as a cable guard on a tool on NASA’s Mars Exploration Rover Opportunity and bears an image of the American flag. The memorial is on the rover’s rock abrasion tool, which was being made in September 2001 by workers at Honeybee Robotics in lower Manhattan, less than a mile from the World Trade Center.