An elegant white sign at Arlington National Cemetery informs visitors they are inside "our nation's most sacred shrine." Run under the jurisdiction of the U.S. Army, Arlington is the final resting place of John and Robert Kennedy, Supreme Court justices Oliver Wendell Holmes Jr. and Earl Warren, and the nation's military royalty from the Civil War to the Iraq war. More than 4 million people visit Arlington every year to tour the legendary grave sites, which include those of "Maltese Falcon" author Dashiell Hammett and big-band leader Glenn Miller, and watch a specially trained U.S. infantry soldier march silently in guard of the Tomb of the Unknowns. Arlington shelters the remains of more than 320,000 service members and holds nearly 30 new funerals a day. As visitors head out into the sacred grounds, the cemetery asks, "Please conduct yourselves with dignity and respect at all times."