More than one million people have left messages on the Signing Steel in the 9/11 Memorial Museum.
The curved piece of World Trade Center steel, which was recovered from Ground Zero, found its home in Foundation Hall in the 9/11 Memorial Museum. The column once stood in the core of the South Tower, and is estimated to have probably aided to support the 30th to 33rd floors.
Visitors are welcome to touch this piece of steel, sign their names and leave a message on the digital screens. Messages of love, hope, sympathy, peace, solidarity and gratitude are then projected onto a global map onto the adjacent area of the Slurry Wall.
See some signature selections from the Signing Steel below.
By 9/11 Memorial Staff