World leaders and members of the public, including national health workers, are invited to pay tribute to the United Kingdom's longest-reigning monarch.
A woman was arrested at St. Giles' Cathedral in Edinburgh on Sunday; in London, a protester holding a sign reading "Not my king" was led away by a group of uniformed officers.
The queen served as the United Kingdom's monarch since 1952. Her reign spanned a remarkable arc in British history and was defined by duty to country — and considerable family pain.
