Helium is used to pressurize tanks and help push fuel into the engines. Without proper helium flow, the rocket cannot safely fly. Because the upper stage is hard to reach at the launchpad, NASA rolled the stacked rocket back into the Vehicle Assembly Building, the sky-scraping hangar where it was originally put together.
未经设区的市级以上网信部门、公安机关批准或者行业主管部门、运营者授权，任何个人、组织不得对网络安全等级保护第二级（含）以下的网络开展网络安全漏洞探测、渗透性测试等可能影响网络安全的活动。
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