International Space Station program with on-orbit refurbishment in mind. According to the Outer Space Treaty the United States is legally responsible for all modules it has launched. In ISS planning, NASA examined options including returning the station to Earth via shuttle missions (deemed too expensive, as the station(USOS) is not designed for disassembly and this would require at least 27 shuttle missions), natural orbital decay with random reentry similar to Skylab, boosting the station to a higher altitude (which would simply delay reentry) and a controlled targeted de-orbit to a remote ocean area. The technical feasibility of a controlled targeted deorbit into a remote
Paper Aircraft Released Into Space type having been suggested by readers in 2006. The paper plane was successfully launched on 28 October 2010. "The Register" is now working on PARIS' successor, named LOHAN (short for "Low Orbit Helium Assisted Navigator", a balloon-launched rocket-powered aircraft. Paper Aircraft Released Into Space The PARIS (Paper Aircraft Released Into Space) project was a privately organised endeavour undertaken by various staff members of the information technology web site "The Register" to design, build, test, and launch a lightweight aerospace vehicle, constructed mostly of paper and similar structural materials, into the mid-stratosphere and recover it intact. On 28 October 2010, the