Today in History. As from the HISTORY CHANNEL

https://www.history.com/this-day-in-history/cuban-missile-crisis

In a televised speech of extraordinary gravity, President John F. Kennedy announces that U.S. spy planes have discovered Soviet missile bases in Cuba. These missile sites—under construction but nearing completion—housed medium-range missiles capable of striking a number of major cities in the United States, including Washington, D.C. Kennedy announced that he was ordering a naval “quarantine” of Cuba to prevent Soviet ships from transporting any more offensive weapons to the island and explained that the United States would not tolerate the existence of the missile sites currently in place. The president made it clear that America would not stop short of military action to end what he called a “clandestine, reckless, and provocative threat to world peace.”

What is known as the Cuban Missile Crisis actually began on October 15, 1962—the day that U.S. intelligence personnel analyzing U-2 spy plane data discovered that the Soviets were building medium-range missile sites in Cuba. The next day, President Kennedy secretly convened an emergency meeting of his senior military, political, and diplomatic advisers to discuss the ominous development. The group became known as ExCom, short for Executive Committee. After rejecting a surgical air strike against the missile sites, ExCom decided on a naval quarantine and a demand that the bases be dismantled and missiles removed. On the night of October 22, Kennedy went on national television to announce his decision. During the next six days, the crisis escalated to a breaking point as the world tottered on the brink of nuclear war between the two superpowers.

AND

https://www.history.com/this-day-in-history/american-forces-suffer-first-casualties-in-vietnam

U.S. military personnel suffer their first casualties in the war when 13 Americans are wounded in three terrorist bombings of Military Assistance Advisory Group and U.S. Information Service installations in Saigon. The rising tide of guerrilla activity in South Vietnam reached an estimated 30 terrorist incidents by the end of the year and at least 75 local officials were assassinated or kidnapped in the last quarter of 1957.