Mark Lennihan/AP Photo
A steel beam signed by Obama being installed at One World Trade Center on Thursday.
A steel beam signed by President Obama was installed today on the 104th floor of One World Trade Center, the skyscraper being built to replace the towers destroyed on September 11, 2001.
The beam was signed during a visit to the construction site last month and inscribed with the words, "We remember/We rebuild/We come back stronger!" First lady Michelle Obama, New York City Mayor Michael Bloomberg and Governors Andrew Cuomo and Chris Christie also added their signatures along with construction workers and police officers.
The 35-foot long, 11,000lb beam will no longer be visible as it's sealed into the tower as construction continues.