Parachute Bombs,Block Air Raids

[hesham]

Hi,

http://io9.gizmodo.com/5797332/aerial-mine-fields--a-great-bad-idea-that-never-happened/

 

[lastdingo]

Such a thing was proposed for anti-helicopter purposes. Essentially, H2 balloons that lift up a kevlar cable which would wind around rotors of any helicopter that flies through the barrier.