Engineers are taking their skills into outer space. In the ceaseless quest for knowledge, a vast orbiting laboratory is being built hundreds of kilometres above the .\r<br>\r<br>In her final days as Commander of the International Space Station, Sunita Williams of NASA recorded an extensive tour of the orbital laboratory and downlinke.\r<br>\r<br>The biggest, the longest, the fastest, the scariest. Engineers are taking their skills into literally uncharted territories. In the ceaseless quest for knowledge, a vast .
