; (2) testing of such weapon systems should include flight testing, ground based testing, and underwater launch testing; (3) the Department of Defense should adhere to the requirement in section 1688 of the National Defense Authorization Act for Fiscal Year 2017 ( Public Law 114–328 ) to proceed to a Milestone A decision on the conventional prompt global strike weapons system not later than September 30, 2020, or the date that is 240 days after the successful completion of intermediate range flight 2 of such system; (4) the United States cannot afford to lose its advantage over foreign countries in developing hypersonic weapons