The Northrop Grumman Cygnus cargo spacecraft was captured by the International Space Station's robotic arm. Credit: NASA ...

Welcome back to the Fluctus Channel for an examination of the maintenance required to keep one of the largest cargo planes ever flying. Fluctus is a website and YouTube channel dedicated to sea geeks.

The Smithsonian is almost ready to open five more of the Air and Space Museum's halls as its 7-year renovation continues.