I agree, Skyjob, that there are some apparent US ATC issues that may help, but ultimately navigation is not their responsibility unless providing vectors. Nor is clearing an aircraft to land without seeing it intrinsically wrong - it has to be done whenever the cloud or vis are low at every airport, after all. Clearing an aircraft to land while there is traffic ahead of them or still on the runway is damned stupid, but that's a separate issue on another thread.