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 Phil Black talks exclusively to the father of a man who knew the Boston bombing suspect and was killed by the FBI.
RELATED STORY: Father: 'Unarmed' son 'not crazy' enough to attack FBI agent who killed him
Syrian state-run television reports an American and a British citizen are killed for being suspected rebels.
Former Mexican President Vicente Fox and ex-Microsoft manager Jamen Shively discuss legalizing and branding marijuana.
RELATED STORY: Former Mexican president pushing for pot legalization