Of course the US has taught others, as well as its own forces, what techniques of torture are used around the world. That is done to potect individuals from torture, and to make clear what is immoral and should not be done by anyone, which is to torture others.  
 
Moreover, the author is apparently is very uninformed regarding laws and policies of the United States of America that govern activities of all federal agencies, including US Armed Forces, the Central Intelligence Agency, the State Department, and both the Executive and Congressional branches of government.