Markings on no fewer than four emails contained on Hillary Clinton’s private system were changed to a category that blocks Congress and the public from viewing their contents ... One of the lawyers present during the review by State’s legal office was government attorney Catherine Duval, who was a key player in the controversy surrounding ex-IRS official Lois Lerner’s missing emails related to the investigation of the agency’s targeting of conservative groups. Duval, who is now spearheading the release of materials related to the 2012 attack in Benghazi, formerly worked for the same law firm as the Clintons’ private attorney...