Army officials are laying the groundwork for a new electronic-warfare capability designed to protect ground vehicles on the road against attacks, eying a beefed-up version of the jammers widely used to disable makeshift bombs in Iraq and Afghanistan, according to a service official. "We know right now there is a need to have vehicle protection in every vehicle that's out there on the road," Col. Jim Ekvall, the electronic warfare division chief at Army headquarters, said in a recent interview...