Rocketplane Kistler (RpK) was a reusable launch system firm originally based in Oklahoma.[1] It was formed in 2006 after Rocketplane Limited, Inc. acquired Kistler Aerospace. NASA announced that Rocketplane Kistler had been chosen to develop crew and cargo launch services. However, having missed financial milestones NASA terminated funding for the project. It filed for chapter 7 bankruptcy in 2010.[2]