Hovercraft: several shots of men at bell aerospace plant bolting body of experimental hovercraft together, as seen from inside hull, from outside. Shots of men at work on components of same. HA ESTABLISHING view of interior of hangar, 2-3 men at work. Several MCSs, MSs of men at work. MLSs, with ZOOMs IN, ZOOMs OUT, of assembled hovercraft tethered outside hangar, men standing by, hovercraft rising on its moorings.