FILE - In this Oct. 25, 2013 file picture the US  flag flies  on top of the US embassy in front  of the  Reichstag building  that houses the German  Parliament, Bundestag, in Berlin,  A German official says Chancellor Angela Merkel's chief of staff has asked the U.S. ambassador for a meeting to discuss the latest reports of alleged U.S. spying on Germany. The official says chief of staff Peter Altmaier invited Ambassador John B. Emerson to the chancellery Thursday July 2, 2015.  (AP Photo/Michael Sohn,file)
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