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CNN's Susan Candiotti speaks to Adam Lanza's former schoolmate who says Lanza was "very withdrawn."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
Newtown, Connecticut, police spokesperson Lt. Paul Vance speaks out about the tragedy and how it could have been worse.
Many are concerned over what can be done about school safety after the Newtown shooting. Lisa Sylvester reports.
CNN's Brianna Keilar takes a look at what action President Obama will take on gun control following the shoot in Connecticut.
Wolf Blitzer profiles Adam Lanza's first victim – his mother, Nancy Lanza.
RELATED STORY: Shooter's mother struggled to raise son, relative says
Powerful memorials dedicated to the victims of shootings in Newtown, Connecticut, document a city in mourning.
Newtown, CT firefighter Jeffrey Thomas opens up about the scene Friday and talks about 26 wreaths delivered to the firehouse.
CNN's Dr. Sanjay Gupta talks with Wolf Blitzer about the stages of grief after losing a loved one.
Wolf Blitzer profiles some of the reported victims of the school shooting in Newtown Connecticut.
Wolf Blitzer, Soledad O'Brien & Howard Kurtz trade notes on what it's like to put aside emotion when covering tragedies.