Dream of invisibility

Progress in this area are reported with excitement by several defence agencies. Some already funded studies on new materials capable of making invisible to ios soldiers.

na night December 1940, the engineer Edmund Godfrey Burr, in the service of the Canadian Navy, had a disconcerting experience.

As I watched with a binocular an airplane landing, saw him disappear so unexpected. After much thought, came to understand what had happened.
What was observing was the plane's black profile against the background of the sky.

The runway was covered with snow. The moonlight reflected from the surface illuminated white sea skimming the plane, eliminating the contrast with the brightness of the sky, causing the plane to be made invisible to their eyes.

The experience of Burr began a series of experiments whose aim was approaching craft with a light of the same intensity that the widespread in the sky.
Thus, its profile would be indistinguishable in night flights.

The evidence came to reduce by up to 75% visibility of the craft, but to advance the war, the priorities of the Canadian Navy changed and the trials were interrupted in 1943.
However, the military have never stopped dreaming of invisibility. One of the keys of war is not being seen by the enemy.
The concealment and masking of troops and equipment moving million in the research of the most powerful armies.

One of the most relevant results in this field is the Stealth technology. Machinery equipped with it have a color, shape, noise, electronic and thermal controlled so that it is very difficult to detect with radar.

What is clear is that the concealment total change in sight wars. "I suspect that the military are already working on the invisibility through the metamaterials", warning Ulf Leonhardt.

Indeed, some teams already receive funding from the British Navy, Army and the U.S. also is investigating military applications of these compounds.

The dangerous lives of spies

The English writer Graham Greene described as nobody in his novel The human factor how difficult it is to live on the skin of a double agent, the thin line between loyalty of treason. Playing two bands requires self-control that can only support the spirits more temperate, so good doubles players are so appreciated by the intelligence services. Some of them have spent as much information as an army full of analysts.

The Spanish Juan Pujol Garcia was one of the most critical, because not helped little to decant World War II in favor of the Allies. Born in Barcelona in 1912, was the son of an industrialist Catalan who fought for Franco in the Spanish Civil War.
It began collaborating with nationals, but left the country to check repression of the Franco dictatorship after the war.

Installed in London, Pujol, known as Garbo by their interpretative skills, misled the Nazis working as a double agent for British intelligence and convincing that the Normandy landings was only a ploy of distraction prior to the real goal.
The Germans bite the hook and came to decorations. Pujol died forgotten in Venezuela in 1988.
More sounded the case of marriage was formed by the American Jewish Julius and Ethel Rosenberg, "the atom spies".
A court were accused in 1951. McCarthyism was in the middle of the witch-hunt of the USSR to sell the secrets of the atomic bomb. They died in the electric chair in 1953.