Muller was executed by firing squad at the Tower of London in 1915. PHOTOS: Secrets, spy tools and a 110-year-old lemon are on show in an exhibition from Britain's MI5 In a coda that would not be ...

National Archives staff members look at facets of a recreation of the double cross operation room which was headed up by the XX committee circa 1944, during a preview for the MI5: Official Secrets ...

LONDON (AP) — A desiccated 110-year-old lemon that played a key role in espionage history is one of the star attractions of a London exhibition drawn from the files of MI5, Britain’s domestic ...