NASA Revamps, Delays SLS Tanking Test

Credit: Joel Kowsky/NASA
CAPE CANAVERAL—Problems with a helium isolation check valve on the upper stage of the Space Launch System (SLS) rocket prompted NASA on April 9 to revise plans for a full tanking test and to delay a modified wet dress rehearsal (WDR) to April 14. Instead of filling the SLS core and Interim Cryogenic...

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