Army infantry rifle squads need to become more mobile, lethal and survivable on the battlefield, according to a top general. “The best weapon system that we have in our Army is a rifle squad,” Gen. James Rainey, the commanding general of Army Futures Command, said during a breakfast Wednesday hosted by the Association of the United States Army. “Every dollar you spend on soldierly value validates . . . the cost of a weapons system.” Talking about the role of...