Three men, including two Southern Albertans, have been charged after a massive cocaine bust at the Canada-US border.  The lengthy investigation started with a 10-kilogram cocaine bust in Great Falls in July of last year.  Another six kilograms of the drug was seized at the Coutts border crossing in March.  31-year-old Abram Klassen of Taber, 35-year-old Jacob Dyck of Coaldale and 33-year-old Isaak Banman of Mexico face charges including importing cocaine and conspiracy to import cocaine.  The two Alberta men were arrested today while Banman was already in custody on related charges in London, Ontario.  Investigators say the cocaine was in its purest form and has ties to organized crime in Mexico.