FILE - In this Tuesday, Dec. 11, 2018 file image from video made available by NASA, Russian cosmonaut Oleg Kononenko, right, and Sergei Prokopyev perform a spacewalk outside the Soyuz spacecraft attached to the International Space Station. Prokopyev and Kononenko, who have explored a mysterious hole in a capsule docked to the International Space Station, say on Monday, Dec. 24 Russia's law-enforcement agencies are investigating its cause.(NASA via AP, File)