COLUMBIA, S.C. (AP) — The variety of documents that federal prosecutors have demanded from the two utilities involved in a failed nuclear power plant project in South Carolina could offer some hints about what investigators are focusing on in their probe. Federal authorities are seeking all documents that served as the basis of a 2015 report detailing a litany of problems with the project, from logistical mistakes to an inability to rein in contractors, according to the subpoena, provided to The Associated Press by one of the power companies involved in the project, Santee Cooper. The Bechtel engineering firm's report became public as executives testified at a legislative hearing last month, with lawmakers threatening to subpoena it if the utilities refused to provide it.Read more on NewsOK.com