Contribution by Dr.A.E.Zlobin
on 2011 Planetary Defense Conference

Dear colleagues, As you know, I investigated the Tunguska comet impact during 25 years. It is very difficult to work without any financial support and to have really independent opinion. Unfortunately, my work was accompanied by another problems too. Today I must declare this information. When I worked hard on Tunguska problem, my family was terrorised by criminal group. This criminal group processed my old father and occupied my home on south-west of Moscow. I am afraid that some results of my Tunguska investigation are stolen by gangsters. If you remember, I already erased all results of my Tunguska study in 2005. In 2007 I quickly restored a part of results and delivered it on 2007 Planetary Defense Conference. Today I erase all latest results of my Tunguska study again. Thus, I determine my contribution on 2011 Planetary Defense Conference as "repeated destruction and erasing of my study for its protection against gangsters". Scientists are working to protect our Earth against comets and asteroids. Also I have a question: "Is it necessary to protect scientists against gangsters?"