They were rigging the envelop and it needed to be partially inflated. Rigging is where they fasten in the parachute top, red line pulleys as well as the red line and load cables. The picture above is looking inside the balloon from the bottom.
Here is the outside of the balloon. It is really a big beautiful balloon that we are looking forward to flying over and around Cedar Rapids SOON! darn weather.
Look for this and our other balloons.