By Sabine Siebold ANKARA, July 7 (Reuters) - NATO will launch a strategic airlift fleet of Airbus A400M transport planes and add one aircraft to its existing fleet of A330 MRTT tanker planes, Secretary General Mark Rutte said on the sidelines of a NATO summit in Ankara on Tuesday. He was speaking at a defence industry gathering where allies unveiled arms deals worth billions of dollars to show they are heeding U.S. calls to spend more to defend Europe before joining President Donald Trump for th