14 CFR 45 . 21 saysExcept as provided in 45 . 22 , no person may operate a U . S . registered aircraft unless that aircraft displays nationality and registration marks in accordance with the requirements of this section and 45 . 23 through 45 . 33 . I ' m passing along what I heard in the reports I linked to along with others . There are reports of aircraft without the usually mandatory markings . <| sep |> The article clearly says One of the company ' s clients , Kamil Ekim Alptekin , a Turkish businessman close to Turkey ' s leader and who has real estate , aerospace , and consulting interests , told The Intercept that one of his companies , Inovo BV , paid Mr Flynn ' s company tens of thousands of dollars for analysis on world affairs . What proof do you want , a YouTube video ? A cellphone picture of Flynn selling information ? It ' s okay to question the legitimacy of the claim , but quit jumping through hoops trying to justify everything Trump does . What is it going to take to make you start questioning the guy you ' re blindly supporting ?