I have no hard proof just indications from documents and sources. He can't without creating a problem for Bush. Phase I will finish this year with chemical spraying, see Dayton OH Chemtrails . That's hi best guess at this point. Phase II will commence sometime this year or in 2002.
Food shortages are next on the agenda.
My best guess is, the alien agenda had shifted the balance of human survival. JFK and RFK knew this and tried to change things in their time.