Long Before Chinese Spy Balloons, Japan Sent the Fu-Go Balloon Bomb

The idea of the Fu-Go balloon bomb was Japan's attempt to set wildfires and injure Americans. A rare attack on the U.S. mainland during WWII.

How Japan Used Balloon Bombs to Kill Americans at Home During WWII

Opinion: Terror in the skies! This isn't the first time North America has been threatened by balloons - The Globe and Mail

Fu-Go balloon bomb - Wikipedia

Some questions about the spy balloon – Kevin Drum

Spy Balloons Are Also the New Secret Weapon of the United States

Japanese Vengenance Balloon Bombs of World War II - J. David Rogers

Japanese Balloon Bombs Targeted the US During WWII

Suspected Chinese spy balloon shot down over Atlantic was taller than the Statue of Liberty - CBS News

Chinese spy balloon sparks memories of Japanese balloon bombs during WWII

China balloon row: Japan used similar balloons against US in WW2, World, News

How Japan Used Balloon Bombs to Kill Americans at Home During WWII

China's spy balloon - a load of hot air?

2023 Chinese balloon incident - Wikipedia