Another DC hearing on the IRS scandal resulted in more "I don't knows" from folks who were either asleep at the wheel, conveniently failed to notice or are blatantly lying.

Today we get to hear Lois Lerner, head of the IRS Tax Exempt Status office invoke the 5th over and over again.  Below, Doug Shulman who headed the IRS up until last November refuses to aplogize for the incident.