William Blum at Foreign Policy Journal put together this handy guide to the C.I.A.'s foreign policy efforts since the end of World War II.
From William Blum's Foreign Policy Journal article, "We Came, We Saw, We Destroyed, We Forgot":
Since the end of the Second World War, the United States of America has …
Attempted to overthrow more than 50 governments, most of which were democratically-elected.
Attempted to suppress a populist or nationalist movement in 20 countries.
Interfered in democratic elections in at least 30 countries.
Dropped bombs on the people of more than 30 countries.
Attempted to assassinate more than 50 foreign leaders.