Josef Jakobs SW3, on 4–5 August 1941. The trial was held "in camera" because the German agent had been apprehended in a highly classified intelligence operation known as the Double Cross System. The British were aware that Jakobs was coming because his arrival information had been passed on to MI5 by the Welsh nationalist and "Abwehr" double agent Arthur Owens. After a two-day trial which involved hearing the testimony of eight witnesses, Jakobs was found guilty of spying and sentenced to death. Jakobs's execution took place at the miniature rifle range in the grounds of the Tower of London on 15 August
Josef Mašín one, aptly named "Tři Králové" ("Three Kings"), is the most known among the Czech public. Mašín was captured by the Gestapo on May 13, 1941. After being tortured, he twice attempted suicide. As part of the German retaliatory measures for the assassination of Reinhard Heydrich he was executed in Prague, aged 45. His body was disposed of at Strašnice Crematorium. His wife was imprisoned for several months. After the war, Josef Mašín received a posthumous promotion to Brigadier General. His sons - then 13 and 15 years old - got Medals for "personal bravery during the war" from president Edvard