Breaking News from CBS

• Probe begins after Conn. commuter trains collide

  Metro-North Railroad collision that sent dozens to the hospital, severely damaged tracks under investigation

• New Yorker's Strongbox: Can it shield anonymous sources?

  Online dropbox coded by the late Aaron Swartz aims to provide place where people can anonymously send information to magazine

• Video: Time Lapse: Montreal by Winter

  Stunning time lapse video exhibits the relationship between Montreal, its residents and winter. Video courtesy of Stephane Hoareau Timecode Lab.

• Video: "Best friends" remember Hadiya Pendleton

  Hadiya Pendleton's young life was cut short when she became the unintended victim of a gang-related shooting. Her friends talks to "48 Hours" correspondent Maureen Maher about what made the 15-year-old so special.

• Video: David Muhammad takes a stand against gangs

  Living in one of the most violent districts in the city, a Chicago man risks his own life to rid his street corner of drug dealers and gangs. His weapon of choice? A video camera.