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.
Burnley v Brentford, Saturday 3pm。夫子对此有专业解读
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Последние новости。同城约会对此有专业解读
You can listen to the full interview with Baroness Kidron on BBC Radio 4 at 17:30 GMT on Saturday on or BBC Sounds.
Can world models touch grass?