The guardian said Snowden is to release US gov't assassination program documentation in a weeks time. So perhaps we will get insight on the in inner workings of systematic killing.
I believe the preferred nomenclature is 'targeted killing'.
I'll be surprised if it doesn't have some whitewashed name like "Citzenship Revocation Program" that lets people talk about it without saying "killing".
More like "Citizen Revocation Program". Wouldn't want citizenship reduced and people earning and paying taxes to other countries.