Photo taken on Nov. 1, 2013 shows Edward Snowden's letter to German Chancellor Angela Merkel, the German parliament and German federal prosecutors. U.S. whistleblower Edward Snowden is willing to help the German government in its probe into U.S. spying in Germany that included alleged monitoring of mobile phone communications of Chancellor Angela Merkel, according to the letter released on Friday by German Green party lawmaker Christian Stroebele. (Xinhua/Zhang Fan)