Vice President Lyndon B. Johnson assumed the presidency upon Kennedy's death. Several years later, his brother Robert told Look magazine that his father had left Boston because of signs that read: 'No Irish Need Apply.' Young John attended the Riverdale Country School−a private school for boys−from 5th to 7th grade, and was a member of Boy Scout Troop 2 in Bronxville, New York. In April 1931, he had an appendectomy, after which he withdrew from Canterbury and recuperated at home. On June 10, 1963, Kennedy, at the high point of his rhetorical powers, delivered the commencement address at American University in Washington, D.C. Also known as 'A Strategy of Peace', not only did the President outline a plan to curb nuclear arms, but he also 'laid out a hopeful, yet realistic route for world peace at a time when the U.S. and Soviet Union faced the potential for an escalating nuclear arms race.' The President wished: