Three thousand migrants from Latin America are attempting to enter the US en masse. How are they organising it - is it just word of mouth or does technology play a part? Digital forensics, why an online washing machine could land you in hot water. Robot flies become real but they won’t be landing in your drinks any time soon. The role of fake news in starting World War II. How the Nazis conned the allies into allowing them to invade Czechoslovakia, with a very modern sounding deception.(Photo caption: Thousands of Honduran migrants resumed their march toward the United States from the southern Mexican city of Ciudad Hidalgo – credit: AFP/Getty Images) Producer: Julian Siddle