Wolf Blitzer delivers the most important breaking news and political, international, and national security stories of the day. Tune to The Situation Room weekdays 5-7pm ET on CNN.
CNN's Tom Foreman takes a closer look at how and where Monday's terror attack in Boston occurred.
RELATED STORY: Boy, 8, one of 3 killed in bombings at Boston Marathon; scores wounded
A photographer captured the two explosions at the Boston Marathon up close.
RELATED STORY: Boy, 8, one of 3 killed in bombings at Boston Marathon; scores wounded
Boston Marathon runner Tom Hay talks to CNN's Wolf Blitzer about what he saw and heard during the explosion.
RELATED STORY: Boy, 8, one of 3 killed in bombings at Boston Marathon; scores wounded
CNN's Brian Todd investigates the indoctrination of children in North Korea's propaganda culture.
RELATED STORY: North Korea's propaganda machine grips defector 11 years on
As rumors swirl about North Korea's nuclear capabilities, CNN's Tom Foreman explains what it takes to launch a nuke.
RELATED STORY: On North Korea's big day, Kerry underlines conditions for talks
CNN's Lisa Sylvester reports on a hacking expert who says he's developed technology that can hijack an airplane.
RELATED STORY: Hacker says phone app could hijack plane
Senator makes TV push for immigration deal as lawmakers inch toward a deal. Jim Acosta reports.
RELATED STORY: 'Gang of Eight' sets cutoff date for citizenship under immigration deal