A few, days ago, it has been exactly 150 years since the birth of this great scientist. "A serb who indebted the world", " A man who invented the 20th century" are just a few descriptions people people use when they talk about Nikola Tesla. The scientific compound derived SI unit measuring magnetic flux density or magnetic induction (commonly known as the magnetic field B), the tesla, was named in his honor (at the Conférence Générale des Poids et Mesures, Paris, 1960). He is the only Slavic scientist, to this day, who ever got that kind of recognition.
Some of his inventions are:
Various devices that use rotating magnetic fields (1882)
The Induction motor, rotary transformers, and "high" frequency alternators
The Tesla coil, his magnifying transmitter, and other means for increasing the intensity of electrical oscillations (including condenser discharge transformations and the Tesla oscillator)
Alternating current long-distance electrical transmission system (1888) and other methods and devices for power transmission
Systems for wireless communication (prior art for the invention of radio) and radio frequency oscillators
Robotics and the "AND" logic gate
Electrotherapy Tesla currents
Tesla impedance phenonomena
Tesla effect and the Tesla electro static field
Tesla principle
Bifilar coil
Telegeodynamics
Tesla insulation
Forms of commutators and methods of regulating third brushes
Tesla turbines (eg., bladeless turbines) for water, steam, and gas
Tesla pumps
Tesla igniter
Tesla compressor
X-rays Tubes using the bremsstrahlung process
Devices for ionized gases
Devices for high field emission
Devices for charged particle beams
Arc light systems
Methods for providing extremely low level of resistance to the passage of electrical current (predecessor to superconductivity)
Voltage multiplication circuitry
Devices for high voltage discharges
Devices for lightning protection
VTOL aircraft
Dynamic theory of gravity
Concepts for electric vehicles
Polyphase systems

Also, prior to his death, Tesla worked on a new type of weapon, called "death rays" or "peace rays". He believed that it would revolutionaze the warfare. Two days after he talked about this in an interview given to a magazine Liberty in 1935, he was contacted by a German viceconsul in New York. Tesla declined to meet him. He was in contact with Yugoslavia, USA, USSR and UK about this weapon. Although none of these countries actually contracted Tesla to build this weapon, he was under close surveillance of the great powers. After Germany invaded Yugoslavia, Tesla, in 1941, wrote to his nephew, Sava Kosanovic who was a member of the exiled yugoslav goverment that he had practically finished the weapon. Unfortunetaly (or fortunately), Tesla died in 1943 before finishing this project.

The point of this thread is twofold:
1. To pay respect to a great man and great scientist
2. I would like to know if anybody knows more about this weapon he claimed he created.