The Expedition 74 crew completed a busy week of science hardware maintenance at the International Space Station, following the release of two cargo spacecraft in less than a week. The crew continued reviews for next week's spacewalk, continued their human research program, and prepared another spacecraft for departure. Northrop Grumman's Cygnus XL completed its resupply mission to the station when the Candarm2 robotic arm released it into Earth orbit on March 12. JAXA's HTV-X1 cargo spacecraft left the space station on March 6 and will orbit Earth for several more weeks of remotely controlled science experiments before an atmospheric reentry above the South Pacific Ocean. NASA flight engineers Chris Williams and Jack Hathaway completed the workweek servicing a variety of research gear, including a large centrifuge for a smaller centrifuge inside Kibo’s Saibo rack to support future biology experiments. Roscosmos cosmonauts Sergey Kud-Sverchkov and Sergei Mikaev completed a weeklong cardiac study observing how weightlessness impacts their circulatory system.