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.
Lois Lerner, the head of the IRS unit handling tax-exempt status, invoked her Fifth Amendment right against self-incrimination before the House Oversight Committee on Wednesday. CNN's Dana Bash reports. (Video)
RELATED STORY: IRS official in charge of targeting unit takes the 5th