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.
6.12013
7.21993
9.42023
6.71971
6.31972
5.92019
6.21985
6.42018
6.62004
6.02020
6.22012
6.72017
6.21932
6.41969