Army Secretary Dan Driscoll has ousted his entire slate of civilian advisers in a sweeping move aimed at clearing space for voices from the tech world, as the service doubles down on its push to modernize with a Silicon Valley-style lens. On Friday, Driscoll notified the 115 members of the Civilian Aides to the Secretary of the Army program, or CASA, an all-volunteer group that serves as the secretary's eyes and ears in communities across the country, that their roles were being terminated. "