His mother was English and his father was Dewitt Mackenzie , who was head of the London Bureau of the Associated Press .
Mackenzie was born on April 6 , 1930 in Hampstead , England .
Mackenzie 's mother was English and his father was Dewitt Mackenzie , who was head of the London Bureau of the Associated Press .
Mackenzie was born on April 6 , 1930 in Hampstead , England .