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second explosion, said Richard DesLauriers, FBI agent in charge in Boston.
• "Somebody out there knows these individuals as friends, neighbors, co-workers or family members of the suspects," he said. "Though it may be difficult, the nation is counting on those with information to come forward and provide it to us."
• They looked much like typical college students, but DesLauriers described them as armed and extremely dangerous, and urged anyone who sees or knows them to tell law enforcement and "do not take any action on your own."
• ___
Boston bombing investigation underscores vast expansion of surveillance by police and public
• As the investigation of the Boston Marathon bombings illustrates, getting lost in the crowd is no longer an easy feat. There are eyes -- and cameras -- everywhere.
• Investigators swiftly obtained a vast quantity of amateur photos and videos taken by onlookers, often with their cell phones, as well as extensive footage from surveillance cameras in the area of the blasts. The FBI released images Thursday from one of those cameras, zeroing in on two men in caps who have become the suspects in the case. They're seen walking together; the FBI said one of them later set down a backpack where the second explosion occurred.
• If indeed the video provides the crucial break in the Boston case, surveillance cameras -- which have proliferated in London, Chicago and elsewhere -- may take on new allure. Informal surveillance by private citizens may proliferate as well; the FBI says it expects the public to be its "eyes and ears" as the investigation continues.
• The upside of this expanding surveillance network is clear -- a greater potential for law enforcement to solve crimes and, in some instances, to prevent them. David Antar of New York-based IPVideo Corporation says video surveillance can be set up to trigger warnings if bags are left unattended or suspicious activity takes place before or during a large-scale event.
• Is there a downside?
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Official toll in Texas fertilizer plant explosion still murky, but residents know who is gone
• WEST, Texas (AP) -- The neighborhood surrounding a Texas fertilizer plant that erupted in a thunderous explosion is gone, and the residents here know they've lost (Continued on page 27)
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