What costs $450 million dollars and lasts for less than a month? If you guessed “shuttle launch” then you are correct. If something breaks on board the ISS the astronauts have to wait for for the next mission to receive their replacement parts. 3D printing technology offers a cost effective and practical solution to this problem that has plagued the ISS for years. For example, in 2006 the Elektron Oxygen Generating System ceased to function because of a blown fuse. Although oxygen levels of the ISS are constantly monitored, depleted levels of breathable air is always a concern for NASA (we all love oxygen). If all goes according to plan, by 2014 the ISS should have printers on board that will print parts on demand.