The House Armed Services seapower and projection forces subcommittee wants to block the Air Force from making its planned KC-135 retirements until after a key upgrade to the KC-46 remote visual system is completed. The subcommittee's mark of the fiscal year 2021 defense policy bill , if approved, would prevent the Air Force from retiring any legacy KC-135 tankers before FY-23 due to concerns the Defense Department may face a tanker shortfall due to delays delivering the new KC-46. Boeing...