SAN FRANCISCO -- In an age of near instant communication, Twitter again became the world's town square as traffic to the service spiked minutes after the deadly Boston Marathon explosions.
People rushed to Twitter for real-time information on fatalities and injuries. It was the first to air the news of the explosions at the finish line (10 minutes ahead of cable news) and to break the news of multiple explosions and mass casualties as users posted firsthand accounts and photographs.
Foursquare founder and Chief Executive Dennis Crowley, who was running the marathon to raise money for Camp Interactive, a program to expose underprivileged youth to technology, turned to Twitter to let friends and family know he was OK. (He also used it to ask journalists to "leave us alone right now.")
Twitter, which lets users tap out 140-character status updates, has transformed how breaking news events are recorded and covered whether in on-the-ground reports such as a Pakistani man live tweeting the deadly raid on Osama bin Laden's compound in Abbottabad) or in on-the-plane reports from the Hudson River plane crash.
Yet Twitter users are still working out how to respond in a crisis. Many helped spread the word of ways to connect with loved ones including a new people-finder tool from Google. They also tried to police each other by cautioning against posting rumors and speculation.