近期,美空军前任参谋长韦尔奇受空军部长詹姆斯委托牵头完成的一份评估报告称,如果空军希望未来能拥有经济可承受的两个系列火箭,就需确保空间探索公司(Space X)和联合发射联盟(ULA)获得一定数量的军用卫星和情报卫星发射任务。报告认为,美军已经有较长时期没有出现两家公司竞争发射服务的情况。因此,美空军如果希望在中 Recently, Air Force’s former chief of Staff Welch, commissioned by Air Force Secretary James James, said in an assessment report that if the Air Force hopes to have affordable two series of rockets in the future, it will be necessary to ensure that Space X and The United Launch Alliance (ULA) has acquired a number of military satellite and intelligence satellite launches. The report argues that the U.S. military has not competed for launch services for two companies over a relatively long period of time. Therefore, if the U.S. Air Force wants to be in the middle