The head of Russia's space agency, Roscosmos, has warned that most Russian equipment on the International Space Station (ISS) is out of warranty. This comes after a coolant leak in the station's Russian segment, the third in less than a year. Roscosmos boss Yuri Borisov stated that the ISS is approaching the end of its existence and that 80% of Russian equipment is beyond its warranty period. Russia's space programme has faced multiple setbacks, including the loss of Mars missions and a lunar probe.