Spaceflight News— MSR delayed and split in half (spacenews.com) (PDF: nasa.gov)— Northrup Grumman eyeing its own SLD contract (spacenews.com) (nasa.gov) (HT Andrew Z: twitter.com/wapodavenport) — NG received six additional CRS-2 missions last month (govconwire.com)Short & Sweet— Crew Dragon production is ending (teslarati.com)— Slingshot Aerospace gets USSF contract (spacenews.com)Questions, Comments, Corrections— Andrew Z via email: nautical miles are actually useful!— From the intro: ISS seat swap negotiations (spacenews.com)This Week in Spaceflight History— 4 April, 1984: Launch of Challenger flight STS-41-C (youtube.com VIA nss.org) (nytimes.com) (PDF: nasa.gov) (harvard.edu) (planet4589.org) — A good book about Shuttle: The Space Shuttle Program: Technologies And Accomplishments by Davide Sivolella (vdoc.pub) — MMU Users Guide indicates a proportional relationship between nominal “cruise” speed and length of travel (PDF p38: large.stanford.edu)— Next week (4/12 - 4/18) in 1985: Swat that fly