LONDON — 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 ...

A 110-year-old lemon used by a German WW1 spy to send secret messages from Britain with invisible ink is going on display in MI5’s first ever public exhibition. The blackened and flattened fruit ...

He was executed by firing squad at the Tower of London. Now, his trusty lemon — 110 years old and shriveled black — will be on display starting Saturday in a new exhibit called “MI5 ...

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 ...