Keating alleges that the Soviet Union is building "rocket installations" in Cuba and urges President Kennedy to take action.

Pavlicek informs Prague that negotiations have proceeded with some progress, while there is still a tense aura in the air. An invasion of Cuba by the United States is now an unlikely prospect, given American failures to penetrate Cuban airspace, the quick organized response of the Cuban armed forces, and the widespread support Cuba receives from the socialist countries of the world. Pavlicek promises the Czechoslovak government that the embassy will make all necessary provisions to providing information on the ongoing negotiations between the United States and the Soviet Union.

Further reports from Pavlicek indicate despite soft rhetoric from the United States indicating a willing to negotiate, aggressive preparations against Cuba continued. In particular, there was a large reinforcement of air force bases in Florida and Key West, as well as an announcement of increased intensity of air reconnaissance over Cuba. By the time of this message, there already have been exchanges between Cuban anti-aircraft guns and U-2 recon planes. However, there are no significant measures observed among military installations in Europe, with Czechoslovak troops maintaining maximum combat readiness. Very few instances of insubordination and dissent are found.

A telegram from the Mexican Embassy in Cuba describing that the government of Cuba had given the order to be at battle stations to all its armed forces in anticipation of an air attack against Cuba by the United States.

Soviet envoy to the UN, G. Zhukov, reports to the Soviet leadership on his discussion with US diplomat John McCloy. The US diplomat said that the US hoped the U2 spy plane pictures taken the day before will show that the withdrawal of Soviet Missiles was proceeding as agreed. Provided that progress was made on the issue of Cuba, further cooperation between the two superpowers was possible, including an agreement on an atmospheric test ban and on the militarization of the outer space.

Robert Kennedy relays the results of a meeting with Dobrynin regarding the shooting down of an American plane over Cuba and the presence of long-range missiles there.

Malinovsky and S.P. Ivanov report the shooting down of an American aircraft, which had taken surveillance pictures of the disposition of troops on Cuba.