A press freedom group is trying to unseal still-secret court files about a federal investigation that snared a State Department intelligence analyst for leaking North Korean nuclear information to Fox News reporter James Rosen.The Reporters Committee for Freedom of the Press is asking a federal judge in Washington to make public search warrants and some surveillance orders issued in connection with the case that led to analyst Stephen Kim receiving a 13-month prison sentence in 2014.A motion the group filed Friday says a few search warrants related to the case were unsealed in 2013, but others appear to still be under seal — some seven years after Kim gave Rosen information that the U.S.