Part two in our ongoing series on the science of antigravity. Richard welcomes back the son of the late Dr. Frederich Alzofon to discuss his father's work in the field of antigravity science.  GUEST: David Alzofon is a technical writer and the son of Dr. Frederick Alzofon (1919 – 2012), inventor of gravity control. From the mid-1950s through 2012, he had a ringside seat to the development of the technology, and actively searched for investors in Silicon Valley from 1981 through 2012,  In the six years following his father’s death, he has ramped up efforts to publicize his father’s discoveries with the publication of two books: Gravity Control With Present Technology and The Top-Ten UFO Riddles – Solutions from Science. More than anyone alive he understands the theoretical basis of the technology and why it has met with so much resistance from establishment physics, in spite of being endorsed in a 1960 report by the U.S. Air Force and the overwhelmingly favorable impression his father made upon knowledgeable critics.