With that job complete, the sign has come down and is heading to the 9/11 Museum.
"We want to make sure it will stand the test of time," Jan Ramirez, chief curator for the 9/11 Museum, said.
With a pair of white gloves, Ramirez carefully showed the media the sign. The final count was nine years and 232 days.
The makeshift countdown to the recent death of the world's most wanted terrorist first belonged to Cheryl Stewart.
"I was very happy it was going to the museum. I think it's the perfect place for it here in the museum here in New York," Stewart, a sculptor from Brooklyn, said.
The sign is joining thousands of other pieces inside the museum, which will open its doors in 2012. The sign was in front of Stewart's home for nearly a decade.
"It was a terrible blow to me because I took it very personal to me because my city was attacked... 3,000 of my neighbors were killed," Stewart said.
Ramirez says she first learned about Stewart's sign the day after bin Laden was killed in a raid by U.S. Navy SEALs.
"On May 2, I got to work, logged onto my computer and I already had three or four emails from friends and from John Q. Public asking if we were aware of the sign that had been in Redhook, Brooklyn for a number of years," Ramirez said. "She was absolutely thrilled that we called and said, right off the bat, 'You're the perfect place to have it.'"
It's still unclear where exactly in the museum the sign will be placed.
"We haven't figured it out yet although we think we know where it will go in the historical exhibition," Ramirez said.
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