"Taps" is sounded during each of the military wreath ceremonies conducted at the Tomb of the Unknown Soldier every year, including the ones held on Memorial Day. The ceremonies are viewed by many people, including veterans, school groups, and foreign officials. "Taps" also is sounded nightly in military installations at non-deployed locations to indicate that it is "lights out", and often by Boy Scouts, Girl Scouts and Girl Guides to mark the end of an evening event such as a campfire.