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Ground Zero officially becomes the National September 11th Memorial today.

On the anniversary of September 11, Inc.com reflects on innovations that emerged out of the countrys most tragic event, from Meetup to One World Trade Center.

From building-blocking bollards to millimeter-wave scanners , the September 11 terrorist attacks have led to significant changes in security techniques and technology worldwide over the past decade to discourage future attacks and to avoid being surprised again. To meet these goals, law enforcement and counterterrorism operations worldwide have come to rely heavily on surveillance of public spaces. Nowhere is surveillance more pervasive in the U.S

For months, many New York City firefighters worked in the toxic air at ground zero, digging through the rubble of the World Trade Center. Now, as Dr