US diplomat Fred Hof is due in Beirut Thursday, Oct. 7, to try and get Iranian President Mahmoud Ahmadinejad's visit to Lebanon cancelled.DEBKAfile's sources say he is too late. With six days to go, Beirut and South Lebanon up to the Israeli border are Ahmadinejad-land, taken over by an estimated 2,500 airlifted Revolutionary Guardsmen and covered in Iranian flags.