Jeff Rense and Frank Joseph talk about the mysteries of the Tunguska event. This was a very large mid-air explosion that occurred on June 30, 1908 over Siberia. It flattened millions of trees over an area of about 2,000 square kilometers and had an estimated force of about 10 to 30 megatons of TNT. Jeff and Frank discuss the bizarre aspects of this event and speculate about what might have caused it.