With crews of three to six people to support, the International Space Station (ISS) has a tough job that it can't do all on its own. The facility depends on regular resupplies from Earth to carry food, water and equipment for the astronauts on board -- not to mention all the science experiments.
PHOTOS: 'Space Invader' Found on International Space Station
However, in the past year, three separate programs have suffered failures to their resupply programs. But overall, the track record of the program has kept the ISS flying with people continuously since November 2000. On Wednesday (Aug. 19), the Japanese Space Agency (JAXA) launched their H-II Transfer Vehicle (HTV) on a 5-day mission to the ISS.
Let's take a tour of the space station's fleet of private and government-run resupply spaceships.