Don't confuse oyster shell with grit. Grit is insoluble. It stays in the gizzard and it's used to grind food. Oyster shell dissolves in the gut and its job is to add calcium to the diet of laying hens.
Kennedy's strategy of flexible response, managed by Robert McNamara, was aimed to reduce the possibility of war by miscalculation. Kennedy's administration contributed to the peaceful resolution of the Cuban Missile Crisis and refrained from further escalation of the 1961 Berlin Crisis.everal of them were from the foreign policy think tanks. Kennedy had been interested in the issues of war and peace since his youth. In his inaugural address Kennedy encapsulated his Cold War stance as following: Let us never negotiate out of fear. But let us never fear to negotiate.
Digital History ID 3403 An article in the July 1947 issue of Foreign Affairs magazine, signed X, proposed that the West adopt a policy of containment toward the Soviet Union. The article's author, George Kennan, who set up the U.S. embassy in Moscow in 1943, called on the United States to take steps to prevent Soviet expansion. He was convinced that if the Soviet Union failed to expand, its social system would eventually break down. The Containment Policy would adopt two approaches. One approach was military; the other was economic. In 1947, U.S. Secretary of State George C. Marshall proposed a program to funnel American economic aid to Europe.