Former Indian Ambassador to Russia D. Bala Venkatesh Varma has said the successful evacuation operation Ganga to evacuate Indian Students from Ukraine was only possible due to personal understanding between Prime Minister Narendra Modi and Russian President Vladimir Putin.<br />''<br />'' Speaking on Russia-Ukraine Crisis: Strategic Trends and Impact organised by Vivekananda International Foundation in New Delhi, Mr Venkatesh said, the evacuation operation was unique because India had to extract its nationals from the active war zone. He said, almost all Indian nationals have been evacuated particularly the Indian students.<br />''<br />''<br />