[{"n": "Advanced Launch System", "u": "/e/space-launch-vehicles-of-the-united-states/advanced-launch-system/", "s": "Joint USAF-NASA heavy-lift launch vehicle study, 1987–1990."}, {"n": "Astra Rocket", "u": "/e/space-launch-vehicles-of-the-united-states/astra-rocket/", "s": "Low-cost small-lift rocket family with two orbital successes."}, {"n": "Athena (rocket family)", "u": "/e/space-launch-vehicles-of-the-united-states/athena-rocket-family/", "s": "Lockheed Martin solid-propellant launch system, retired and briefly revived."}, {"n": "Athena I", "u": "/e/space-launch-vehicles-of-the-united-states/athena-i/", "s": "American small expendable launch system, four flights from 1995 to 2001."}, {"n": "Athena II", "u": "/e/space-launch-vehicles-of-the-united-states/athena-ii/", "s": "American small expendable launch system, flown 1998–1999."}, {"n": "BluShift Aerospace", "u": "/e/space-launch-vehicles-of-the-united-states/blushift-aerospace/", "s": "American developer of biofuel-powered hybrid rocket engines."}, {"n": "Chrysler SERV", "u": "/e/space-launch-vehicles-of-the-united-states/chrysler-serv/", "s": "Single-stage reusable launch vehicle proposed for the Space Shuttle."}, {"n": "Comet HLLV", "u": "/e/space-launch-vehicles-of-the-united-states/comet-hllv/", "s": "Saturn V-derived super heavy-lift vehicle for lunar and Mars missions."}, {"n": "Commercial Titan III", "u": "/e/space-launch-vehicles-of-the-united-states/commercial-titan-iii/", "s": "Commercial Titan III: four flights, retired after 1992."}, {"n": "Eclipse (rocket)", "u": "/e/space-launch-vehicles-of-the-united-states/eclipse-rocket/", "s": "Partially reusable medium-lift rocket by Firefly and Northrop Grumman."}, {"n": "Firefly Alpha", "u": "/e/space-launch-vehicles-of-the-united-states/firefly-alpha/", "s": "American small satellite launcher developed by Firefly Aerospace."}, {"n": "ITS launch vehicle", "u": "/e/space-launch-vehicles-of-the-united-states/its-launch-vehicle/", "s": "Super-heavy lift launch vehicle designed for Mars missions."}, {"n": "Jarvis (rocket)", "u": "/e/space-launch-vehicles-of-the-united-states/jarvis-rocket/", "s": "Proposed medium-lift rocket from the ALS study, never built."}, {"n": "Juno I", "u": "/e/space-launch-vehicles-of-the-united-states/juno-i/", "s": "Four-stage rocket that launched America's first satellite."}, {"n": "Juno II", "u": "/e/space-launch-vehicles-of-the-united-states/juno-ii/", "s": "American launch vehicle derived from the Jupiter missile."}, {"n": "DIRECT & Jupiter Rocket Family", "u": "/e/space-launch-vehicles-of-the-united-states/direct-jupiter-rocket-family/", "s": "Late-2000s Shuttle-derived alternative to Ares I and Ares V."}, {"n": "Jupiter-A", "u": "/e/space-launch-vehicles-of-the-united-states/jupiter-a/", "s": "Redstone-derived test vehicle for Jupiter MRBM components."}, {"n": "Jupiter-C", "u": "/e/space-launch-vehicles-of-the-united-states/jupiter-c/", "s": "American sub-orbital test vehicle for re-entry nosecone development."}, {"n": "Kistler K-1", "u": "/e/space-launch-vehicles-of-the-united-states/kistler-k-1/", "s": "Two-stage fully reusable launch vehicle by Kistler Aerospace."}, {"n": "LauncherOne", "u": "/e/space-launch-vehicles-of-the-united-states/launcherone/", "s": "Air-launched liquid-fueled rocket for smallsat payloads."}, {"n": "Loki (rocket)", "u": "/e/space-launch-vehicles-of-the-united-states/loki-rocket/", "s": "Unguided anti-aircraft rocket turned successful sounding rocket family."}, {"n": "Mass Driver 1", "u": "/e/space-launch-vehicles-of-the-united-states/mass-driver-1/", "s": "Early electromagnetic launcher built by MIT students in 1976–1977."}, {"n": "National Security Space Launch", "u": "/e/space-launch-vehicles-of-the-united-states/national-security-space-launch/", "s": "USSF program assuring military access to space."}, {"n": "NOTS-EV-1 Pilot", "u": "/e/space-launch-vehicles-of-the-united-states/nots-ev-1-pilot/", "s": "First air-launched orbital attempt; all ten launches failed."}, {"n": "PGM-19 Jupiter", "u": "/e/space-launch-vehicles-of-the-united-states/pgm-19-jupiter/", "s": "First USAF nuclear-armed MRBM, deployed in Italy and Turkey."}, {"n": "Redstone (rocket family)", "u": "/e/space-launch-vehicles-of-the-united-states/redstone-rocket-family/", "s": "American rocket family that launched first U.S. satellite and astronauts."}, {"n": "Reusable Booster System", "u": "/e/space-launch-vehicles-of-the-united-states/reusable-booster-system/", "s": "USAF program for a reusable booster, cancelled in 2012."}, {"n": "Rocket Lab Electron", "u": "/e/space-launch-vehicles-of-the-united-states/rocket-lab-electron/", "s": "Two-stage small-lift rocket with electric-pump-fed engines."}, {"n": "Space Launching System", "u": "/e/space-launch-vehicles-of-the-united-states/space-launching-system/", "s": "US Air Force 1960s launch vehicle family, not built."}, {"n": "SpaceX launch vehicles", "u": "/e/space-launch-vehicles-of-the-united-states/spacex-launch-vehicles/", "s": "SpaceX builds and flies Falcon rockets and develops Starship."}, {"n": "SPARK (rocket)", "u": "/e/space-launch-vehicles-of-the-united-states/spark-rocket/", "s": "American three-stage solid rocket for small satellite launches."}, {"n": "StarTram", "u": "/e/space-launch-vehicles-of-the-united-states/startram/", "s": "Maglev-based space launch system for cargo and passengers."}, {"n": "Streaker (rocket)", "u": "/e/space-launch-vehicles-of-the-united-states/streaker-rocket/", "s": "SpaceDev's low-cost hybrid rocket for quick-response launches."}, {"n": "Terran R", "u": "/e/space-launch-vehicles-of-the-united-states/terran-r/", "s": "Partially reusable heavy-lift rocket from Relativity Space."}]