By Nathan Jeffay, January 6, 2011
During the Second World War, the British government famously released posters warning: "Careless talk costs lives." Now the IDF is running a contemporary equivalent campaign - against indiscreet Facebook posts.
Top brass have written to all commanders asking them to urge subordinates to be careful what they post on Facebook and other social networking sites.
It urges against posting photos taken on bases or pictures of soldiers which give away information about their role in the army, such as by revealing unit insignia, or where they live.