Former Secretary of State George Schultz, who served under President Reagan, has died at age 100.  The Associated Press calls Schultz a “titan of American academia, business and diplomacy.”

The AP writes of Schultz’s career:

He was labor secretary, treasury secretary and director of the Office of Management and Budget under President Richard M. Nixon before spending more than six years as President Ronald Reagan’s secretary of state.

Schultz was the longest serving secretary of state since World War II and had been the oldest surviving former Cabinet member of any administration.

Dan Rather spoke to Schultz in 2015 at Stanford University’s Hoover Institute about climate change, an issue for which he cared about deeply.  Watch the interview above