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Peter Lanza was apparently unaware of his son's involvement in the Newtown shooting. CNN's Mary Snow reports.
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House Intel. Chairman Rep. Mike Rogers discusses the progress toward finding out who is responsible for the Benghazi attack. In an interview with CNN's Wolf Blitzer, Rogers said the investigation is "going too slow" and the Libyans "are not being completely helpful."
Joe Samaha, father of a Virginia Tech shooting victim, discusses how he is coping 5 years after the shooting.
CNN's Susan Candiotti speaks to Adam Lanza's former schoolmate who says Lanza was "very withdrawn."
RELATED STORY: Shooter's mother wanted her son to fit in, friend says