Author Christopher Bright opens his talk at the Dwight D. Eisenhower Presidential Library and Museum by noting that the United States had 841 weapons in its nuclear arsenal when the 34th president took office, and 18,686 when President Eisenhower left the White House. Twenty percent of those weapons were designed to defend Americans against a surprise Soviet nuclear attack. Mr. Bright focuses his remarks on this lesser-known aspect of the Cold War story.