Fog Investigation and Dispersal Operation (FIDO) was an extraordinary system used for dispersing fog from an airfield so that aircraft could land safely. A flammable liquid was pumped along a system of pipes along both sides of the runway being released through outlets made every few yards. The vapours were lit from a series of burners, producing walls of flame. The heat produced lifted the fog. FIDO used huge quantities of fuel, as much as 100,000 gallons [125,000 US gallons, 450,000 litres] per hour. Evening fog obscures Londons Tower Bridge from passers by. ... Runway 13R/31L of El Dorado International Airport, Bogotá, D.C. Aerial picture of a runway of Chennai International Airport, Tamil Nadu A runway is a strip of land on an airport, on which aircraft can take off and land. ...

FIDO systems were used at many airbases in England during World War II, and have been used to bring commercial planes into fog-covered airports in the United States. This article or section does not cite its references or sources. ... Combatants Major Allied powers: United Kingdom Soviet Union United States Republic of China and others Major Axis powers: Nazi Germany Italy Japan and others Commanders Winston Churchill Joseph Stalin Franklin Roosevelt Harry Truman Chiang Kai-Shek Adolf Hitler Benito Mussolini Hideki Tojo Casualties Military dead: 17,000,000 Civilian dead...

The system was developed at the University of Birmingham department of chemical engineering during the Second World War. The University of Birmingham is an English university in the city of Birmingham. ...