to kill the witch.. dont know if you can do it on expert or advanced but i know on easy and normal you can,
grab the auto shotty and aim for her neck or below the head, i got it on my first try
as for the tank though i havent gotten that achievement yet.. ( would playing on versus and letting your friend be the tank work?)
now that cod5 double xp weekend is done
anyone wanan help me beat a story on expert mode? lol havnet had time to do so on the 360
drop me a PM or msg here