Outgoing Defense Secretary Leon Panetta, in announcing his stepping-down from his federal job, said the time has come for him to be with his family at his walnut farm where he can deal “with a different set of nuts,” which prompted laughter from the audience. “The time has come for me to return home to my wife Sylvia, our three sons, their families, our six grandchildren, and my walnut farm—dealing with a different set of nuts,” Panetta said Monday at the White House, alongside President Barack Obama, former Sen. Chuck Hagel (R-Neb.) and counterterrorism adviser John Brennan. …