Boston police spokeswoman helps ring opening bell on stock exchange

Boston police spokeswoman Cheryl Fiandaca helped to ring the opening bell of the New York Stock Exchange Thursday morning, invited by Twitter, which was launching its much-anticipated initial public offering, because of her department’s use of Twitter during the Boston Marathon bombings. Twitter said Fiandaca, actor Patrick Stewart and 9-year-old activist Vivienne Harr were “very different people,” but had one thing in common: “They use Twitter in amazing ways.” Twitter said the Police Department’s tweets served as “a lifeline of communication for the entire city and served as a defense against miscommunication” during the uncertain days after the April 15 bombings, which killed three people and wounded more than 260 others.