Dear Titu, I think many people who will read our conversation are from science faculty and they will understand the things automatically. I don't know about your education qualification but seriously you need to study about isotopes. Everything which you are talking is taught by fake company people. Either you are also part of that fraud company gang or they completely washed your brain. I posted this message because I wanted to save people from this fraud and you will not believe more than 20 people contacted me today and found my information helpful. I don't need your certificate about my self. I have my well settled business in 2 countries and already earning lot with hardwork. DRDO ( Defense Research and Development Organization ) is not involved in such things. It's a government organization. At least think once what are you saying. Now you will say they are using Iridium in satellite things and all. Again its a big fake thing. I have seen Hundreds of articles and travel trough all country for this silly thing. And the companies which you are talking I had a meetings with their owners in Taj Grand, Mumbai. My friend all this is a trap only. There are lots of bluff master made there groups named as a company. All connected to each other. If you are not Thug then I advise you to save your life and quit this line. Note : All viewers stay away from such people. This are either part of the Thug gang or brain washed by them.