Ravi Zacharias, the Christian author and apologist who traveled the world teaching others to defend the faith, died of cancer on May 19 at age 74. Born in Delhi, India, Zacharias converted to Christianity as a teen. He studied theology in Canada and went on to found Ravi Zacharias International Ministries in 1984. The organization now employs about 75 apologists who train Christian leaders around the world. His wife of 48 years, Margie, survives him, as do three children and several grandchildren.