In July 1990, one year before the collapse of the USSR, scholar Nicholas Eberstadt testified before a Senate committee about a CIA study of the Soviet economy, which showed high Soviet meat production and per-capita milk output—exceeding U.S. levels—though shortages were widely reported by tourists and Soviet citizens. “The Soviet government routinely hides many of its efforts from outside views,” Eberstadt granted. “But where, one wonders, are the hidden stockpiles and reserves of Soviet meat?”

Concerned about pigeons carrying military communications, German troops in occupied Belgium during World War I would shoot at overhead flocks. Such fears had not abated by World War II, when the British government ordered a systematic slaughter of pigeons throughout the UK, and inmates at British and Australian interment camps were banned from approaching birds on compound grounds. 

Seventh-century Persian king Khosrow II is said to have tested the loyalty of courtiers whom he believed were becoming too close. Telling one of his decision to execute the other, he would swear the man to secrecy and then watch the friend’s behavior. If it went unchanged, he knew the first man was loyal and had kept silent; if different, he was a traitor and dealt with accordingly. 

A letter dated to the eighteenth century BC sent by a servant to Zimri-Lim, the king of Mari, details a system of long-distance signal fires, thought to be the first ever in use. 

A sect of violent Islamic agents founded in eleventh-century Persia to fight the Fatimid caliph in Egypt became known as the Hashshashin, which translates as “eaters of hashish”; their grand master supposedly administered the drug to demonstrate the paradise that would follow agents’ service. From the name Hashshashin, Christian Crusaders derived the word assassin.