Fox News senior medical analyst Dr. Marc Siegel discusses the role of prayer in the mourning and emotional healing process following the tragic shooting of two National Guard members in Washington, D.C., on ‘The Will Cain Show.’ Fox News senior medical analyst Dr. Marc Siegel discusses the role of prayer in the mourning and emotional healing process following the tragic shooting of two National Guard members in Washington, D.C., on ‘The Will Cain Show.’