Attacks spurred security sector
Companies are pitching ideas for a digital emergency alert network, a 10-finger and palm-print scanner and a Web site dedicated to bioterrorism. On that day, all of those would have seemed bizarre, science-fictional and probably unnecessary. Not anymore.
Since Sept. 11, entire business segments related to security have blossomed. Offices around the country began requiring employees to wear ID badges, benefiting companies that make the cards and the sensors that read them.
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