Defense leaders are seeking less money for an Army plan to install more powerful cannons on Europe-based Stryker vehicles than what the contractor has projected the effort would cost, documents show. According to a reprogramming request presented to Congress this week, the overall price tag for the effort would be $163.2 million in fiscal years 2015 through 2017. Of that amount, $9.8 million is needed in the current fiscal year to begin one-time development work for mounting a 30 mm...