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and did so. Grasshopper began flight testing in September 2012 with a brief, three-second hop at the company's Texas test site,<ref name=sfn20120924>
{{cite news |last=Clark|first=Stephen |title=SpaceX's reusable rocket testbed takes first hop|url=http://spaceflightnow.com/news/n1209/24grasshopper/ |accessdate=2012-09-25 |publisher=Spaceflightnow |date=2012-09-24}}</ref>
followed by a second hop in November 2012 with an 8-second flight that took the testbed approximately {{convert|5.4|m}} off the ground, and a third flight in December 2012 of 29 seconds duration, with extended hover under rocket engine power, in which it ascended to an altitude of {{convert|40|m}}.<ref name=cl20121224/> A fourth test was successfully completed in March 2013, doubling its highest leap to rise to {{convert|80.1|m}} with a 34 second duration.<ref name=
===Falcon 9 booster post-mission, controlled-descent tests===
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