A little more info on this one from Spyderco:
The tragic events of September 11, 2001 had a profound impact on the character of the United States. In addition to forever changing our way of life, they inspired one of our most unique knives ever produced: The Spyderco World Trade Center Knife.
Created in memory of NYPD Officer and Spyderco enthusiast John D’Allara, who was among the lives lost that day, the Spyderco World Trade Center Knife was developed to pay tribute to the victims and raise funds to benefit the loved ones they left behind.
The World Trade Center Knife was a purpose-designed rescue knife featuring a fully serrated CPM® S30V® sheepfoot blade and Spyderco’s patented Ball Bearing Lock™. Its handle was injection molded from fiberglass-reinforced nylon and included an inlaid, hand-finished silhouette of the New York City skyline. Painstakingly machined from steel salvaged from Tower 1 of the World Trade Center, these inlays ensured that every World Trade Center Knife is an enduring tribute to the lives lost on September 11th. All World Trade Center Knives were manufactured in Spyderco’s Golden, Colorado factory, individually serialized, and came in a custom presentation box.
The goal of the World Trade Center Knife project was to produce one knife to honor the memory of every life lost on that tragic day.
Please join us in honoring the memories of those lost on September 11, 2001 and keeping them in our hearts forever.
Never forget