Participants/observers of the National Day of Prayer attend service conducted in the U.S. Marine Memorial Chapel on May 5. The commemoration of the day was conducted by the chaplain's office onboard Marine Corps Base Quantico and religious leaders from five congregations in the community were invited to offer prayers for the world, the nation, our leaders, the armed forces, and our schools and families. - Participants/observers of the National Day of Prayer attend service conducted in the U.S. Marine Memorial Chapel on May 5. The commemoration of the day was conducted by the chaplain's office onboard Marine Corps Base Quantico and religious leaders from five congregations in the community were invited to offer prayers for the world, the nation, our leaders, the armed forces, and our schools and families.