crisis hotline for the first time sent a message between the world's superpowers.
Communicated by Washington to Moscow, the message dated August 30, 1963 was more about testing every letter of the English keyboard than about addressing immediate conflict: «THE QUICK BROWN FOX JUMPED OVER THE LAZY DOG'S BACK 1234567890.»
But since then, the famed hotline has worked to manage tensions — or to send warnings — between Washington and Moscow, whose relations have plunged to new lows over Russia's invasion of Ukraine.
The hotline became reality in the wake of the 1962 Cuban Missile Crisis, with president John F. Kennedy and Soviet leader Nikita Khrushchev agreeing that the world came too close to nuclear war.
Never a literal telephone as depicted in movies, the hotline was originally a clunky telegraph machine with cables under the Atlantic and Europe that each side would test every hour.
The Pentagon, which managed US communications, would often send trivia such as baseball scores while the Kremlin preferred excerpts from classic Russian literature, Howard Patrick, a linguist who helped operate the first machine, said in a 2014 interview with the Pioneer Press in Minnesota.
He said there was shock when the hotline was first put to actual use — a message from the United States to officially inform the Soviets that Kennedy had been assassinated in Dallas.
The tool's first use to avert conflict took place in 1967 during the Six-Day War in the Middle East.