• FBI Agent: No Claims of Responsibility Received  Tuesday, 16 Apr 2013 | 5:16 PM ET

    CNBC's Bertha Coombs reports on the latest on the Boston bombings.

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

    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.

  • Guiliani: Speculation on Attacks Would Be a Mistake  Tuesday, 16 Apr 2013 | 3:29 PM ET

    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

    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 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

    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'  Tuesday, 16 Apr 2013 | 2:04 PM ET

    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

    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."

  • Scenes From the Boston Marathon Bombing Tuesday, 16 Apr 2013 | 1:19 PM ET
    Police officers with their guns drawn hear the second explosion down the street. The first explosion knocked down a runner at the finish line of the 117th Boston Marathon.

    Scenes from the Boston Marathon bombing catastrophe, one of the nation's worst attacks since Sept. 11, 2001.

  • Markets Gain After Attack, But Keep Eye on News Tuesday, 16 Apr 2013 | 1:13 PM ET

    The Boston Marathon bomb attacks had a fleeting impact on markets, but that could change, depending on what investigators uncover.

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

  • Cashin: Growing Hope Boston was Isolated Event  Tuesday, 16 Apr 2013 | 1:00 PM ET

    Discussing how the Boston Marathon tragedy impacted the stock market, and what other catalysts are weighing on stocks, with Art Cashin of UBS; Joe Greco, Meridian Equity Partners; and the "Power Lunch" crew.

  • 'We Are Not Afraid': Boston Merchants Band Together Tuesday, 16 Apr 2013 | 11:53 AM ET

    Boston is feeding and sheltering those affected by Monday's terror. Plus, the Google document that's circulating, which offers stranded travelers free lodging and rides.

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

    "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

    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.

  • 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.

  • Boston Bombings Raise Questions: Pro  Tuesday, 16 Apr 2013 | 11:20 AM ET

    Mark McClelland, head of North America at Maplecroft, talks to CNBC about the Boston bombings and says there are still a lot of unanswered questions.

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

    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

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