A watchdog group filed a lawsuit against the Air Force on Wednesday for allegedly withholding records shedding light on the service’s efforts to set racial diversity quotas when taking on new officers. Gen. Charles Q. Brown Jr., then Air Force’s top officer, updated demographic goals for applicants to become officers in the Air Force in an August 2022 memo, calling the effort “aspirational.” The Center to Advance Security in America (CASA), a watchdog group focused on security and civil liberties, requested communications related to the memo using a federal transparency law the following year,…