Rev. Billy Graham, a Christian evangelist known as "America's Pastor," has died at the age of 99, NBC News reports.
Over the course of his more than 70-year career, Graham preached to an estimated 200 million people across 185 countries, and was granted personal audiences with several U.S. presidents and world leaders. Rev. Martin Luther King Jr. credited Graham's influence, saying: "Had it not been for the ministry of my good friend Dr. Billy Graham, my work in the Civil Rights Movement would not have been as successful as it has been."
Long a presence on television and radio, Graham retired in 2005, citing his health. Graham was diagnosed with Parkinson's disease 25 years ago.