(VCR103)VANCOUVER,BC., July 29 -- Ovide Mercredi, current chief of the Assembly of First Nations, enters the 18th Annual General Assembly of the First Nations in Vancouver on Tuesday. Mercredi later issued a passionate plea for native unity in the face of an insensitive federal government. (CP PHOTO) 1997 (Str-Nick Procaylo)RjB1545edt