"The+great+balloon+bomb+invasion"
![The Great Balloon Bomb Invasion](https://image.tmdb.org/t/p/w300/7Rdbwg0kXDFfb3xkBNraNVMfULc.jpg)
The Great Balloon Bomb Invasion
From 1944 to 1945, Japan sent over 9,000 bomb-equipped balloons over the Pacific to attack America. Historian Martin Morgan goes on a first-of-its-kind hunt for the bombs still lying undetected under the North American surface.