Mix Graham cracker crust ahead and press into bottom and up sides of pan or pie plate. Bake at 375* 8-10 min and set aside to cool.
Blend the sour cream,cool whip,condensed milk and tang until smooth and put in a cooled graham cracker crust. Chill before serving. Can decorate with sliced Kiwi fruit and Mandarin Oranges to look festive. Pie can also be frozen.