Henry Kissinger, who died Wednesday at the age of 100, had many admirers and detractors, but anyone who has studied him would acknowledge his influence on the last century of American foreign policy. In the early years of the Cold War he advocated a policy of détente, accommodating to the Soviet Union. This was later rejected by Ronald Reagan, a strategy that John Paul II supported. But was it the right policy for the right time? Paul Kengor joins us.