Defense Secretary Ash Carter used his personal email account for government business for nearly a year, until December 2015, when news reports revealed the practice, according to hundreds of Carter emails released by the Defense Department. The 1,336 pages of emails and attachments from Carter’s personal account were released late Friday in response to Freedom of Information Act requests by The Associated Press and other news organizations. None contained classified information, and most pertained to routine business such as scheduling and logistics. The Pentagon has long banned the use of personal email for official business. Carter’s use of his personal...