When Mao Zedong ordered a mass killing of birds. In 1958, Mao believed that sparrows would eat all the crops and cause a famine. However, sparrows actually eat a large number of insects, and with the birds gone, the insects destroyed the crops instead. This actually caused the greatest mass starvation in history. BAD CALL.
And that would be pounds to kilos.
Planes measure fuel in weight units not volume!
#10
And no, it was the fleas on the rats that carried the plague!