An interesting tale..... Who can confirm that it happened? Can Castro's whereabouts be verified for that day?
The book is mostly anecdotal. Here is what follows:
Despite Franqui's colorful statements, the most credible theory of what actually happened on October 27 is that a Russian commander of one of the missile batteries, most probably without orders from Khrushchev, nervously or by accident shot down the U-2. This was the conclusion of both the Kennedy administration and of the Russians. The Soviets' longtime ambassador to Cuba, Alexander Alexeev, wrote later in TASS, "In reality, as we now know, the plane was hit by the order of a group ... of Soviet troops in Cuba. It was hit by the commander of the group." The Harvard report backs this up; in the confusion of those days — a confusion that included the question of orders, standing or otherwise, from Moscow — the Harvard group concluded that the "local commander who actually gave the order to fire was apparently General Georgy A. Voronkov, now retired and living in Odessa."
I suspect that the Castro pushed the button account is fictitious. But I wouldn’t be surprised if he actually did order the button to be pushed...