Ukrainian Prime Minister Mykola Azarov has congratulated the staff of the Interfax-Ukraine agency on the 20th anniversary of its establishment. "I am happy to congratulate you today. Twenty years is a short period, but at the same time it's a long enough period to get up on your own two feet, and you have done it," Azarov said while visiting the agency on Friday. "You are a leading information agency, which regularly informs readers of events taking place in the country and abroad," Azarov said.