Cosmonauts Oleg Kononenko (left) and Alexey Ovchinin commemorated Alexei Leonov, the first human to walk in space, who turns 85 on Thursday, with signs attached to their Orlan spacesuits during their May 29, 2019, spacewalk. The sign attached to the spacesuit at left translates to, "Leonov #1." The sign on the spacesuit at right says, “Happy Birthday, Alexei Arkhipovich,” (Leonov’s patronymic name).