21.   The project was a highly classified effort to detect Soviet nuclear weapons using balloons that carried radar reflectors and acoustic sensors, the GAO report said.

22.   He said remote-controlled aircraft and balloons would be used to drop nationalist Chinese flags on the islands if the protesters failed to land.

23.   About seven balloons were being used to lift the hull section, about three stories high and two stories wide.

24.   Using balloons as observation platforms in war goes back more than a hundred years to the US civil war when they were used to direct artillery fire.

25.   Some Middle Eastern countries already are using balloons for military purposes.