Two Russian multipurpose Ka-32 helicopters have been sent by Moscow to the city of Nis, southern Serbia, in order to increase humanitarian aid for recently flood-hit Balkan country. Last week, Moscow sent 10 lifeboats and other equipment together with 72 rescuers who have already helped evacuate more than 2000 people, including 604 children. "Ka-32 crews which have a huge working experience in emergency...