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CNN's Tom Foreman takes a closer look at how and where Monday's terror attack in Boston occurred.
President Obama reiterated that investigators do not yet know who is behind the explosions in Boston.
A photographer captured the two explosions at the Boston Marathon up close.
Boston Marathon runner Tom Hay talks to CNN's Wolf Blitzer about what he saw and heard during the explosion.
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.
Senator makes TV push for immigration deal as lawmakers inch toward a deal. Jim Acosta reports.