The House Armed Services tactical air and land forces subcommittee’s mark of the fiscal year 2018 defense policy bill directs the Air Force and defense secretaries to study whether it would be more cost-effective to improve the MQ-9 Reaper fleet by upgrading existing Block 1 aircraft to the Block 5 design or by buying new aircraft altogether. Results of the study would be due to the congressional defense committees within 180 days of the defense policy bill's enactment. "This section...