Please answer the following question: Information: - The Sandia National Laboratories, managed and operated by the Sandia Corporation (a wholly owned subsidiary of Lockheed Martin), are two major United States Department of Energy research and development national laboratories. - The United States Department of Energy (DOE) is a Cabinet-level department of the United States Government concerned with the United States' policies regarding energy and safety in handling nuclear material. Its responsibilities include the nation's nuclear weapons program, nuclear reactor production for the United States Navy, energy conservation, energy-related research, radioactive waste disposal, and domestic energy production. It also directs research in genomics; the Human Genome Project originated in a DOE initiative. DOE sponsors more research in the physical sciences than any other U.S. federal agency, the majority of which is conducted through its system of National Laboratories. - Shawn Carpenter is an American Navy veteran and whistleblower ( previously employed by Sandia National Laboratories ) who tracked down a Chinese cyberespionage ring that is code - named Titan Rain by the FBI . He came to national attention when his story was reported on in the September 5 , 2005 issue of Time magazine . Carpenter was an employee of Sandia National Laboratories , investigating security breaches in its networks . However , upon tracking several breaches of Sandia , Lockheed Martin Corporation , Redstone Arsenal , and even NASA , dating back to 2003 , Carpenter noticed patterns that began to appear to link the attacks to a single group . He was impressed by the meticulous , voracious and incredibly fast manner ( sometimes completed in less than 30 minutes ) in which the hackers operated . Such observations led him to alert the federal government of his findings . The Titan Rain hacking operation was first reported in an August 25 , 2005 Washington Post article by Bradley Graham , which did n't mention Carpenter . Graham listed anonymous governmental officials as his sources . After informing his supervisors of the breaches , he was told that his only concern should be Sandia computers , and to drop the issue . His employment was later terminated when Carpenter disobeyed his management and communicated the information about the security breaches to the United States Army and the FBI . He was a confidential informant for the FBI for almost half a year before Sandia discovered his actions . Carpenter reportedly felt betrayed by the termination , as he viewed his actions were a service to his country , similar to that of his previous military service . According to Carpenter , during his termination hearing at Sandia , Bruce Held , Sandia 's chief of counterintelligence , yelled '' ( you 're ) lucky you have such understanding management ... if you worked for me , I would decapitate you ! There would at least be blood all over the office ! '' During the subsequent court case , Held testified that he... What object entity has the relation of 'military branch' with the subject 'shawn carpenter'? Choices: - navy - united states navy
Answer:
united states navy