Three people were killed, and 260 were injured in back to back blasts at 2013's Boston Marathon. "The Star-Spangled Banner" is sung at the tribute one year later.» Read More
Ken Timmerman, Foundation for Democracy in Iran speculates on who might have caused the explosions in Boston.
Tony Nash, Managing Director of IHS, speaks about the state of the global economy and what impact the Boston marathon bombings along with weak data from U.S. & China will have on investor sentiment.
Max Abrahms, Hopkins fellow and terror expert, discusses questions he has surrounding who might have caused the explosives at the Boston Marathon.
A moment of silence was called in the House for the explosions at the Boston Marathon.
Tony Roman of Roman & Associates discusses what the incident in Boston says about security measures in the U.S.
Former assistant secretary of defense Frank Gaffney discusses the information at hand in the Boston explosions, and what it means that no one has taken responsibility.
Former FBI assistant special agent Don Borelli discusses the big job ahead of officials investigating the Boston Marathon explosions.
CNBC's John Harwood reports the White House is now handling the Boston explosions as an "act of terror;" and former assistant secretary for homeland security Robert Liscouski, weighs in.
Stratfor's vp for intelligence Fred Burton offers insight on the 2 explosions near the finish line of the Boston Marathon.
A Boston Marathon spectator describes what he heard as 2 explosives went off near the finish line, and the security that took action thereafter.
Former Secretary of Homeland Security Tom Ridge says the explosives at the Boston Marathon is "a pretty basic device," and discusses the importance of gathering information to finding the perpetrator.
CNBC's John Harwood recaps what President Obama said on the investigations on the 2 explosions in Boston today.
President Obama addresses the 2 explosions near the finish line of the Boston Marathon. "We still do not know who did this, and we will hold them accountable," he says.
A runner from the Boston Marathon explains the 2 explosions she heard near the finish line.
CNBC's Bertha Coombs and NBC's Pete Williams offer the latest reports on the 2 explosions that occurred near the finish line of the Boston Marathon.
Boston Mayor Thomas Menino and Massachusetts Gov. Deval Patrick discuss the investigation into the 2 explosions near the finish line of the Boston Marathon.
KNBC-TV's Alycia Lane had a friend running in the Boston Marathon and describes the panic when 2 explosives went off at the finish line.
Eyewitness Dan McCurio explains that he had just finished the race when the explosions went off. "It was kind of unbelievable," he says. "The ground was shaking."
NBC's Pete Williams reports authorities are still looking at packages found on the streets, and destroying any packages they cannot resolve immediately.
Universal Sports' Dean Walker heard the first explosion and saw the second at the Boston Marathon, and discusses how long the lock down might occur.