this creates a regeneration system, so for every 1,000 liters produced by the space station, 850 liters are reused. maybe it sounds like a technology of the future, but it was developed by a nobel prize winning french chemist in the 1900s. and according to nasa, they are testing the long-form use for longer missions like trips to mars for example. don't trump has made up his mind on a presidential run, so how will his decision impact the field and the 2012 race? your cnn political update is next.