A Long Range Acoustic Device (LRAD), a tactical sound amplification system, recently caused confusion among Cambodians when some covered their noses instead of their ears, believing fake news that Thailand was using poison gas.

On April 22, 1915, a greenish fog drifted over the battlefield north of Ypres in Belgium, choking to death some 5,000 French soldiers and heralding a new type of terror on the Western Front.