He also invented the Skyhook, an air rescue system that involved an airplane and a large helium balloon.

VOA: special.2009.01.14

"Water balloon war! Our whole neighborhood has a water balloon fight, a thousand something water balloons."

VOA: special.2010.07.02

Then,beneath the balloon you have a cabin for the fragile humans."

VOA: standard.2010.06.21

"I was in New York this year watching the Thanksgiving parade and here it was: Shrek,a big balloon just crossing in front of my window and behind him was Mickey Mouse.

VOA: standard.2010.05.27

"Basically,it's an underwater balloon. You've got two parts to it: You've got the balloon here - which is this long cylindrical object - and that's filled with a lighter-than-water substance, which is aviation gasoline."

VOA: standard.2010.06.21