We might never know if the NSA truly spied on German chancellor Angela Merkel. And if the agency did, the details might never come to light, because her government has decided to stop investigating whether Merkel was actually a target. The country's chief federal prosecutor Harald Range has announced in a German-language statement that investigators failed to find sufficient evidence that would hold up in court. Apparently, none of the documents Edward Snowden released contained concrete proof that Merkel's phone was tapped. Range also said that "vague remarks from US officials about US intelligence surveillance of the chancellor's cellphone -- i.e. 'not any more' -- are insufficient evidence."