Valeriy Uvarov, head of the International Information Centre for Ufological Information, states that the Chelyabinsk meteorite was destroyed by “terminators”, these are energetical devices for destruction of cometes and meteorites, and this system was built millenias ago for defence of the Earth. Here an article in Russian with his explanation about the Chelyabinsk meteorite:

http://www.astrosystems.ru/index.php/blogs/177-cheliabinsk-meteorite.html

Valeriy Uvarov has written a book “Yakutia: Valley of Death”, where he describes the case with the Tunguska meteorite and explains the system with the “terminator spheres”. Here a small excerpt:

After the first strike, which shifted the meteorite"s course away from inhabited places, the other "terminator spheres" closed in and began methodically destroying the remnants of the intruder from space. That is why there were bangs from several collisions...

http://www.astrologycom.com/yakutia7.html

 http://www.astrologycom.com/yakutia1.html