NASA has apparently been stripping and reusing parts from old spacecraft, because when you have lofty goals and a limited budget, you gotta do what you gotta do. For instance, it's salvaging the four water tanks installed on the space shuttle Endeavour this week, so the agency can use them to build a new storage system for the International Space Station. Those tanks can store 300 liters in all that can last for 25 to 27 days: they're expected to help free more time for the crew to spend on their experiments. Also, according to NASA spokesperson Daniel Huot, they "could greatly reduce the overall cost to build the new system." Refilling the space station's water reservoir can be time-consuming, since the astronauts recycle every ounce of liquid they can, including urine and sweat.