returns to congress to testify, again, pleading the fifth throughout the hearing. >> i respectfully exercise my fifth amendment right and decline to answer that question. >> the next day, the irs promises it will release all of lerner's emails, even though they were aware of the hard drive crash months earlier. and then on june 13th, the irs finally informs the house of representatives that they have lost lois lerner's emails from january of 2009 to april of 2011 you can't keep six months worth of employee emails? >> one senate investigation, one justice department investigation, and four irs commissioners later, the search for answers continues. >> wow. so are americans buying the claim that crucial emails simply vanished? let's take a look at fox news poll this week. 76% of those surveyed believe the missing emails