Wolf Blitzer delivers the most important news and political stories of the day. Tune to The Situation Room weekdays 5-6:30pm ET on CNN.
3, 2, 1... a frog blasts off with a moon probe. CNN's Jeanne Moos reports on one small leap for a frog and one giant leap for frogkind.
Wolf Blitzer asks Ribal al-Assad, cousin of Syrian president Bashar al-Assad, which side in the conflict used chemical weapons and whether the U.S. should arm the rebels.
Tense diplomatic relations between Russia and the U.S., including some personal attacks by Pres. Vladimir Putin, appear to complicate the Syria crisis further. CNN's Jim Acosta reports on the latest in the negotiations.
CNN has been following the story of Amir Hekmati for years: An Iranian American and former Marine arrested, charged with espionage, and sentenced to death by the Iranian government while visiting his grandmother and other relatives.
Although he was granted a retrial, no one had heard from Hekmati–until now. In a letter he sneaked out of prison and to the State Department, he says that his confession was made under duress. CNN's Brian Todd reports on the details Hekmati reveals in his letter and what chances he has of being released.
News that broke in The Situation Room: Syria's ambassador to the United Nations says that the country is now a "full member" of the Chemical Weapons Convention, an international treaty that banned chemical weapons in 1997. CNN's Nick Paton Walsh looks at what happens next for the al-Assad regime's stockpiles.