第三個階段是一般的核反應，這或多或少可以與相互保證的銷毀相配合。通過這種方式，美國將對共產主義者發動全面的核反擊。因此，政策反應分為兩個主要階段來應對共產主義的威脅(Jones, 2012, p. 382)。 1962年10月22日晚，美國總統約翰·f·肯尼迪發表電視講話，向美國公民通報了蘇聯對古巴投放核武器的破壞性意圖。靈活應對的優勢在於，美國獲得了展示其軍事霸權的機會。這一偉大的創新是在武器的種類以及這些武器的預定用途方面取得的。靈活反應原則的另一個好處是，美國和蘇聯能夠在不包括任何核武器的情況下解決局勢。缺點是，通過確保摧毀任務，許多目標工業和城市被摧毀，它們從戰爭中恢復幾乎是不可能的，或非常緩慢。
The implementation of the flexible response was to develop several options for the warfare. The main motto was to find the options other than nuclear weapons. The flexible response was divided in three main stages. The first stage was called as the direct defense. This stage included the options to stop the Soviet first strike with the use of conventional weapons. Kennedy believed winning quickly with limited wars and stopping the expanding conflicts. This is because expanding conflicts could have resulted in general wars, which everyone wanted to avoid. The goal of the earlier Presidents of America was to reduce the cost on the war, for which they reduced the number of troops, but Kennedy emphasized on enforcing sufficient flexibility instead of focusing on cost (Hoffman, 2009). Through this stage Kennedy also believed that European allies should contribute to their defense. The second stage of the Flexible Response was Deliberate Escalation; this was meant to limit the use of the nuclear weapon.
The third stage was the General Nuclear Response, which could be more or less match with mutual assured destruction. Through this America would take total nuclear response attack on Communists. Thus, the policy response was divided in two main phases to address the communist threats (Jones, 2012, p. 382). On the evening of October 22nd in the year 1962, President John F. Kennedy gave his televised speech, through which he informed the citizens of America about the destructive intentions of the Soviet Union, as they had set a nuclear weapon on Cuba. The advantage of the flexible response was that America got the chance to display its military supremacy. The great innovation was achieved in the types of weapons and also in the intended use of these weapons. Also the advantage of the Flexible response doctrine was that America and Soviet Union were able to resolve the situation, without including any kinds of nuclear weapons. Disadvantage was that through assured destruction mission, many targeted industries and cities were destroyed, and their recovery from the war was nearly impossible or was very slow.