Who is purging the Russian military intelligence and why?

For several months already, rumors have abounded about the reported conflict between the head of the Russian military intelligence service (GRU), Valentin Korabelnikov, and President Medvedev. Today, the Russian media announced that Korabelnikov had been replaced by one of his deputies, Alexander Shliakhturov. Of all the intelligence and security services of the former Soviet Union and Russia, the GRU was by far the most secretive. It was also one of