President Serdar Berdimuhamedov congratulated Oleg Kononenko, Hero of Turkmenistan, instructor-test cosmonaut, commander of the cosmonaut corps of the «Roscosmos» State Space Corporation on his birthday.

Taking the opportunity, the head of state wished him good health, long life and family well-being, as well as great success in his professional activities for the benefit of the progress of all mankind.