The iron and sulphur still behave like iron and sulphur in the mixture, but iron sulphide has different properties from both iron and sulphur. You can separate the iron from the mixture using a magnet but this does not work for iron sulphide. 1  Page.
Search for: An Airworthiness Directive (A.D.) is a directive issued when the FAA realizes that a perilous condition exists in a product (aircraft engine, airframe, appliance or propeller). They notify aircraft operators and owners of potentially unsafe conditions that need special inspections, alterations, or repairs.
A new counterintelligence directive (pdf) requires all Department of Defense personnel to report a wide range of suspicious activities and behavior to counterintelligence officials. The directive effectively deputizes millions of military and civilian employees of the Department as counterintelligence agents or informants.