“The people who were boxing [up the vice presidential office] had no idea that there was anything in there that shouldn’t leave the White House,” the source said. Some of the aides who were with Biden while he was vice president are now White House staff. The White House did not immediately respond to requests for comment about Chung and the other aides being interviewed. On Thursday, the White House acknowledged that documents with classified markings had been found in a garage at Biden's residence in Wilmington, Delaware. The timeline for packing up Biden’s vice presidential office was highly constrained by the fact that he was engaged in his duties until his final hours.