> ぁ、風船爆弾って気球ｻｲｽﾞだったのか(;´Д`)

http://uk.geocities.com/sadakichi09/army/fu-go.JPG

Balloon bomb "Fu-Go"
Balloon Diameter : about 10m
Bomb loaded : 150Kg Bomb X 1, Incendiary bomb X 2

The Japanese army build balloon bombs to attack the American mainland.
9000 balloon bombs were used, and considerable damage was given to 
each place in the United States.

参考：2001/12/19(水)20時34分33秒