Mainland scientists have discovered a "super material" that is as light as a balloon yet as strong as metal, which could be developed by the mainland's military into armour that protects troops ...

Current law allows the release of up to 10 helium-filled balloons in a 24-hour period. But critics say that the law is not ...

Art Thompson:There's a series of nylon strings that run through that balloon material to be able to carry the weight. 801:01:26:02 01:01:31:20Narrator:As the balloon climbs, the helium expands ...