Billionaire Citadel founder Ken Griffin has already conquered the land and the sea in Miami Beach. His next target? The air.  City commissioners approved Griffin’s massive private megayacht marina at 120 MacArthur Causeway a few months ago, but now Griffin wants to chopper in. He submitted a request for a private, waterfront helipad at his sprawling Terminal Island development, the Miami Herald reported. The proposal, sponsored by Miami Beach Commissioner Joseph Magazine, is navigating the city’s Land Use and Sustainability Committee and the Planning Board. To clear the runway for Griffin, officials would need to amend Miami Beach’s land development […] This article originally appeared on The Real Deal. Click here to read the full story.