Answer: Russia
Notes: Russia successfully tested its Angara-A5 space rocket from Vostochny Cosmodrome. Earlier attempts on April 9 and 10 were canceled due to technical issues. The rocket reached an altitude of over 25,000 kilometers per hour. This marked Russia's third successful test. The test coincided with Cosmonaut Day, commemorating Yuri Gagarin's historic spaceflight in 1961. The Angara-A5 is a 54.5-meter, 773-ton three-stage rocket capable of carrying 24.5 tons into space.
