File photo taken on July 12, 2017 shows a Bombardier CS300 aircraft of Latvia's national airline company airBaltic at Riga International airport, Riga, Latvia. Latvia's national carrier airBaltic is going to order up to 60 more Bombardier CS300 airliners for its fleet in a deal worth more than 5 billion euros (5.81 billion U.S. dollars), company CEO Martin Gauss announced on Monday. (Xinhua/Janis)