A retired Army officer wrote to a U.S. senator Saturday about his concern that the Department of Homeland Security is preparing to arm itself against the people of the United States. Retired Capt. Terry Michael Hestilow posted his letter to Sen. John Cornyn, R-Texas, on his Facebook page, noting that Homeland Security has made a number of large ammunition, weapon and light-armored vehicle purchases recently and has refused to answer questions about them. Hestilow begins by noting the large ammunition, weapon and light armored vehicle purchases recently made by DHS, as well as that agency’s refusal to answer any questions...