U.S. president Obama's chief of staff and former deputy national security advisor, Denis McDonough, meets with Peter Altmaier, Chancellor Merkel's chief of staff, and Gunter Heiss, head of Directorate-General 6 of Germany's Federal Intelligence Service in July 2014. The meeting was part of an effort to improve U.S.-German relations following the problems created by NSA spying in Germany. This meeting took place following the shooting of a Malaysian airline flight over Ukraine and the call for stronger western sanctions on Russia. U.S. president Obama sought to convey to Merkel the importance he placed on German-U.S. relations after Obama failed to make a serious effort to soothe tensions with Germany over spying revelations.