"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.
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.
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.
Arthur Hogan, Lazard Capital Markets, discusses what's likely driving the rebound in today's markets following the tragic events in Boston yesterday.
Large events around the globe are affected by the tragic events in Boston, reports CNBC's Tom Mackenzie.
Markets trade in trends. And on Monday, that trend flipped to negative. So why was it such a pivotal day for determining short-term market direction?
CNBC's Scott Cohn has the latest details on the tragic bombings in Boston yesterday.
Lawrence Glazer, Mayflower Advisors, explains why yesterday's tragic events may cause some people to re-evaluate their investment plans.
The Boston Marathon attack has prompted increased security around the U.S., reports CNBC's Jackie DeAngelis.
The "sort of attack" we saw in Boston, feels like the kind of attacks we've been seeing in the past 10 years or more, said, Stewart Baker, Steptoe and Johnson partner. "We are going to find these folks, the Bureau is really good at dealing with this kind of evidence and crime scene," he added.
Boston Police Commissioner Ed Davis explains why this attack could be difficult to solve, reports CNBC's Scott Cohn.
Political leaders gathered in Boston to address security concerns surrounding the bombings which took place at the Boston Marathon. Among the speakers were Gov. Deval Patrick, (D), Mayor Thomas Menino, (D), Sen. Elizabeth Warren, (D), and Richard DesLauriers, Head of Boston's FBI.
The markets and the economy will move past the Boston bombings "relatively quickly," but there may be some "lingering impact," Ameriprise Financial's chief market strategist says.
A large area of downtown Boston was cordoned off by police on Tuesday as authorities hunted for a suspect in the deadly bombings at the Boston Marathon.
Officials are taking extra precautions at the major stock exchanges after yesterday's bombings in Boston, reports Jackie DeAngelis.
CNBC's Scott Cohn reports officials are sifting through the evidence for clues as to who is responsible for the deadly bombings in Boston on Monday.
CNBC's Eamon Javers, reports the latest details on how the Federal government is responding to Monday's deadly bombings at the Boston Marathon.
Marc Chandler, Brown Brothers Harriman; Ian Sheperdson, Pantheon Macroeconomic Advisers; and Wilbur Ross,WL Ross & Company, discuss how a slew of economic data due out later this morning will likely impact the markets.
CNBC's Scott Cohn talks to an eyewitness at Monday's bombing at the Boston Marathon.