I'm curious why barrage balloon techniques aren't being utilized to
protect against terror attacks from the air. A well-engineered
network of modern balloons should improve the likelihood of diverting
all but the largest commercial aircraft from U.S. point targets vice
an Avenger salvo, and balloons have many advantages. Large caliber,
rapid-firing artillery such as an upgraded Skysweeper could further
contribute. Views?

Pondering,
Yossarian