Forbes states that his fines are, among other things, because he operated his drone in "Philadelphia’s Class B airspace (KPHL)" without authorization on several

Forbes states that his fines are, among other things, because he operated his drone in "Philadelphia’s Class B airspace (KPHL)" without authorization on several occasions. The FAA website is quite clear about what Philadelphia’s Class B airspace is about: "The primary purpose of a Class B airspace area is to reduce the potential for midair collisions in the airspace surrounding airports with high density airtraffic operations."