The Joint Requirements Oversight Council is delaying validation that the RQ-4 Global Hawk's capabilities are on par with those of the U-2, as the Defense Department waits to see whether Congress scraps that certification requirement in the final fiscal year 2018 defense policy bill. The House's version of the FY-18 defense legislation included a provision to repeal a section of the FY-12 National Defense Authorization Act that would require Gen. Paul Selva, vice chairman of the Joint Chiefs of Staff...