Surveillance video shows the moment of impact when a packed train slams into the end of the line in Buenos Aires, Argentina - an accident that killed 49 people and injured hundreds.
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CBS News correspondent Clarissa Ward has made her way into Syria twice in recent weeks reporting on the rebels. Scott Pelley speaks with her about recent developments in the country and what it's like reporting independently without the permission of the government.
Up until now, the Obama Administration has firmly rejected calls to arm the Syrian opposition. But, as Norah O'Donnell reports, White House spokesman Jay Carney has opened the door to the possibility.
Veteran war correspondent Marie Colvin - an American - and award-winning French photo-journalist Remi Ochlik were killed in the Syrian government's bombardment of the city of Homs. Scott Pelley reports.
Hundreds more injured as commuter train came into busy Buenos Aires station too fast; Nation's worst train wreck in decades
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