Soyuz 4 mission started with the launch on January 14, 1969, 07:30:00 UTC, carrying Commander Vladimir Shatalov, Flight Engineer Aleksei Yeliseyev and Research Engineer Yevgeny Khrunov into orbit. Two days later mission achieved the first ever docking of two crewed spacecrafts, having Soyuz 4 docked with Soyuz 5 spacecraft. Since no connecting tunel had been developed yet, the two cosmonauts had to spacewalk from one vehicle to another. The mission concluded with a safe landing back on Earth on January 17, 1969, 06:50:47 UTC.