The Tomb of the Unknowns is a monument dedicated to American service members who have died without their remains being identified. It is also known as the Tomb of the Unknown Soldier; it has never been officially named. It is located in Arlington National Cemetery. During the day in summer months from April 1 to September 30, the guard is changed every half hour. During the winter months, from October 1 to March 31, the guard is changed every hour. After the cemetery closes to the public (7 p.m. to 8 a.m. April through September, and 5 p.m. to 8 a.m. October through March), the guard is changed every 2 hours. The above information is from Wikipedia.com and for more interesting information on the tomb from Wikipedia click here.
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