• Boston Crime Scene Photos Show Twisted Remains of Device

    Investigators appear no closer to finding a suspect but are learning more about the bombs used, reports CNBC's Scott Cohn.

  • 'Soft Targets' Concern Security Experts   Wednesday, 17 Apr 2013 | 8:32 AM ET
    'Soft Targets' Concern Security Experts

    CNBC's Eamon Javers has the latest details on a ricin-laced letter sent to Sen. Wicker's office. And, Clark Ervin, former Homeland Security Department official; and Clint Van Zandt, former FBI profiler, discuss whether Monday's bombing leaves major events such as sporting, more vulnerable to future attacks.

  • Boston Bombs Believed Packed in Pressure Cookers   Wednesday, 17 Apr 2013 | 8:03 AM ET
    Boston Bombs Believed Packed in Pressure Cookers

    CNBC's Scott Cohn reports the type of devices used in Monday's bombing in Boston are beginning to emerge.

  • Federal Agents Zero In on Bomb's Charred Remains   Wednesday, 17 Apr 2013 | 7:32 AM ET
    Federal Agents Zero In on Bomb's Charred Remains

    Bomb fragments are being reconstructed at an FBI laboratory, reports CNBC's Scott Cohn. And, Philip Mudd, New America Foundation, discusses the psychological impact of terrorism and how to avoid copycat attacks.

  • Congress Reacts to Ricin Letter & Boston Bombings   Wednesday, 17 Apr 2013 | 7:10 AM ET
    Congress Reacts to Ricin Letter & Boston Bombings

    CNBC's Eamon Javers has the latest details on a ricin-tainted envelope sent to the office of Sen. Roger Wicker (R-MI). Sen. Jack Reed (D-RI) and Sen. Angus King (I-ME) discuss a poison-laced letter sent to Capitol Hill, as well the Boston Marathon bombings.

  • Boston Bombs Possibly Delivered in Black Duffle Bags   Wednesday, 17 Apr 2013 | 6:04 AM ET
    Boston Bombs Possibly Delivered in Black Duffle Bags

    CNBC's Scott Cohn reports the FBI and state and local law officials are intensifying their probe into Monday's bombing at the Boston Marathon, recovering two pressure cookers packed with nails and other metals.

  • McCaffrey: Bombs 'Not Sophisticated, Foreign-Made'   Tuesday, 16 Apr 2013 | 4:36 PM ET
    McCaffrey: Bombs 'Not Sophisticated, Foreign-Made'

    Security consultants say the entire calculus of protecting a marathon has changed, reports CNBC's Scott Cohn; and Gen. Barry McCaffrey, ex-National Security Council member, weighs in. "[These bombs] were not sophisticated foreign-made intelligence provided devices," says McCaffrey.

  • Giuliani on Boston: We've Prevented Many Attacks

    Former Mayor of New York City Rudy Giuliani, who guided his city through the Sept. 11 attacks, said any speculation in the case of the Boston marathon attacks would be a mistake.

  • Boston Marathon Bombings Aftermath   Tuesday, 16 Apr 2013 | 3:00 PM ET
    Boston Marathon Bombings Aftermath

    Two explosions went off near the finish line of the Boston Marathon on Monday; 3 people died, and 176 people were hospitalized due to injuries, reports CNBC's Scott Cohn.

  • Social Media & the Boston Bombings   Tuesday, 16 Apr 2013 | 2:57 PM ET
    Social Media & the Boston Bombings

    Social media has made an impact after the Boston bombings. There were more than 1.5 million tweets mentioning Boston just after 4:30 ET.

  • Too Complacent About Safety?   Tuesday, 16 Apr 2013 | 2:53 PM ET
    Too Complacent About Safety?

    The tragedy at the Boston Marathon on Monday was a terrible reminder of our safety. David Ropeik, Ropeik & Associates, shares his opinions.

  • White House: Boston to be Handled As 'Act of Terror'

    The finish line of a marathon is a high for runners, and of course that all changed in Boston yesterday, with CNBC's Scott Cohn.

  • National Security in Washington Spotlight   Tuesday, 16 Apr 2013 | 1:45 PM ET
    National Security in Washington Spotlight

    The latest on the terror events in Boston and how the nation's capital is responding, with CNBC's Eamon Javers.

  • US Not as Vigilant as Europe on Terror: Analyst Tuesday, 16 Apr 2013 | 1:31 PM ET

    The deadly Boston Marathon bombings won't "change the way we live" in the United States, said Jack Jacobs, a retired U.S. Army colonel who received the Medal of Honor. "We haven't had attacks like they have in Europe."

  • Officials: Explosives May Have Been Triggered By Timer

    President Obama expressed confidence the FBI and other agencies are investigating the deadly Boston Marathon bombing, reports CNBC's Bertha Coombs.

  • Expect Heightened Security Measures: Expert   Tuesday, 16 Apr 2013 | 11:38 AM ET
    Expect Heightened Security Measures: Expert

    "There are no options taken off the table," said Michael Leiter, former Director of the National Counterterrorism Center, discussing how the bombings in Boston will impact domestic and global security measures.

  • All Clear at Logan Airport After Security Search   Tuesday, 16 Apr 2013 | 11:38 AM ET
    All Clear at Logan Airport After Security Search

    CNBC's Bertha Coombs has the latest details on reopening of Boston's airport, as law enforcement officials continue to collect video from surveillance cameras and watch for a man seen leaving the scene after the blast.

  • Pres. Obama Calls Boston Bombing an 'Act of Terrorism'

    We don't yet know who planned and executed this, said President Obama, but we will find who did this and bring them to justice. As we receive more information we will make sure to keep the American people posted, he added.

  • Markets Post Gains Despite Jitters   Tuesday, 16 Apr 2013 | 11:17 AM ET
    Markets Post Gains Despite Jitters

    Arthur Hogan, Lazard Capital Markets, discusses what's likely driving the rebound in today's markets following the tragic events in Boston yesterday.

  • London Prepares For Thatcher's Funeral & Marathon   Tuesday, 16 Apr 2013 | 11:13 AM ET
    London Prepares For Thatcher's Funeral & Marathon

    Large events around the globe are affected by the tragic events in Boston, reports CNBC's Tom Mackenzie.