A mother and son from New Jersey have both pleaded guilty to federal charges stemming from the sale of cheap parts for military equipment to the U.S. Department of Defense. Linda Mika, 73, of Jackson, pleaded guilty on Tuesday to conspiracy to commit wire fraud, the U.S. Attorney’s Office District of New Jersey said in a news release. Kenneth Mika, 53, of Ewing, pleaded guilty to same charge last month. The mother and son were employed by a maritime equipment company that was a federally approved contractor. From 2016 to 2020, the Mikas entered into contracts with the Department of Defense on …