After 30 years, NASAwasendingitsspaceshuttleprogram, butitwasneversupposedtolastthatlong.
Anyways, thespaceshuttlewasoriginallyproposedas a 15 yearprogramtodevelop a reusableandlowcostwaytogettospace, mainlytoehaulupthematerialsneededtobuildtheinternationalspacestation, andthenonceitwasbuilt, thepeopleneededtorunit.
Thespacestationis a footballfieldsizedresearchstationinlowearthorbit, invaluablenotonlyforlearningaboutspaceitself, butalsoforexperimentinginmicrogravity, whichcan't berecreatedonEarthonthespacestationwassuccessfullybuilt, buttheshuttleneverquiteliveduptoitslowcostpromise.
A spacesixcanshowthatithandinhandwithNASAcanlaunchpeoplesafelyintospacethanitopensupthishugecommercialmarketforspaceandonethatisdistinctlyanAmericancommercialmarket.
That's whythislaunchwasdeemedessentialevenduring a pandemic.