Historian Douglas Brinkley says the challenges Abraham Lincoln faced while in office make him history's best president.

Andrew Lincoln, star of AMC's "The Walking Dead", discusses his accent & drops a few hints about the future of the show.

Producer Jen Hauser talks about the difficulty of "quietly accepting" two lottery winnings while working for CNN.

A study reveals some baby formula and snack bars have arsenic in them. Elizabeth Cohen has the details.

Be mindful of your social media postings, Homeland security is watching. CNN's Lizzy O'Leary reports.

Two years after bankruptcy, GM is making profits, but cutting back on employee pensions. Alison Kosik reports.

Shoshana Johnson, former Army Specialist and Iraq War POW, discusses changes that will put women closer to the front lines of combat.

Ralph Reed, former leader of the Christian Coalition, talks CPAC and culture wars with CNN’s Suzanne Malveaux.

Arizona 8th grader Joe Hudy and Bill Nye the Science Guy discuss a marshmallow cannon that wowed the President.

A Syrian dissident speaks to CNN's Suzanne Malveaux and describes daily bombings and sniper attacks in the city of Homs.