Williams spent seven hours pumping air into BEAM in May after the first attempt to unfold the module ended up in failure. Now that it's set up and ready for testing, the ISS crew could check up on its condition up to 67 times a year. BEAM or Bigelow Expandable Activity Module is an experimental space habitat jointly developed by NASA and Bigelow Aerospace. It was shipped to the ISS folded to save space aboard SpaceX's Dragon capsule and had to be inflated to its full size. Bigelow Aerospace is also working on a much bigger expandable module that it hopes to send to orbit by 2020.