Vostok 4 was launched a day after Vostok 3 and it carried cosmonaut Pavel Popovich to orbit. While the mission is considered a success it had several issues, a malfunction in the life-support systems caused the cabin temp drop to 10C but Popovich continued the mission, the big issue came when he mentioned seeing thunderstorms. He saw actual thunderstorms in the Gulf of Mexico but mission control thought Popovich had said a codeword for early mission ending and the mission was cut a day short. He completed 48 orbits and the mission lasted 2 days, 22 hours & 56 minutes. August 12, 1962 at 08:02 UTC · Launch Successful Vostok-K — Soviet Space Program, to Low Earth Orbit 1/5, Baikonur Cosmodrome, Republic of Kazakhstan Crew: Pavel Popovich The world's 187th orbital launch attempt, and 45th of 1962. Program: Vostok Data: Launch Library 2, The Space Devs. Image via The Space Devs.