Germany's incoming three-party government is set to join as an observer the first meeting of signatories to a U.N. treaty banning nuclear weapons, a coalition agreement showed Wednesday, signaling a policy shift for the key NATO member.Coming at the end of the long-standing administration led by Chancellor Angela Merkel, the shift would make Germany the only Group of Seven member to attend the conference set to be held in Vienna next March, and potentially put pressure on Japan, which relies on the U.S. nuclear umbrella for protection, to do the same.As a member of the North Atlantic Treaty…READ FULL ARTICLE