To answer it, let's first understand about Space Walk. According to NASA, any time an astronaut gets out of a vehicle while in space, it is called a spacewalk. A spacewalk is also called an EVA. EVA stands for extra-vehicular activity. Till time, only Russia, the United States and China have the capability to perform an EVA. A situation where the astronaut does not fully leave a spacecraft is call a Stand-up EVA (SEVA). In SEVA, the astronaut is completely reliant on the spacesuit for environmental support. Its name originates from "standing up" in the open hatch to record or assist an astronaut doing a spacewalk.
The first person to walk in space is Alexey Leonov
. He is a retired Russian cosmonaut. His walk in space was taken place on Voskhod 2 flight. General Leonov is deputy director of Gagarin Cosmonaut Center, in charge of international and guest cosmonauts. He is also editor, designer, and cartoonist for APOGEE, the formerly super secret cosmonaut newsletter. In 1960, Leonov was selected to be part of the first cosmonaut group with 19 other Soviet Air Force pilots. His walk in space was originally to have taken place on the Vostok 1 mission, but this was cancelled. He was connected to the spacecraft by a 5.35 meter tether when he was outside the craft for 12 minutes and nine seconds on 18 March 1965. Leonov trained hard for the mission and had spent eighteen months undergoing intensive weightlessness training. Leonov opened a valve to allow some of the suit's pressure to go off after his spacesuit had inflated in the vacuum of space to the point where he could not re-enter the airlock at the end of the spacewalk.
Many honours and awards were bestowed upon Mr. leonov. Some of the are Twice Hero of the Soviet Union (in 1965 and 1975), Pilot-Cosmonaut of the USSR (in 1966), Order for Merit to the Fatherland (for his contribution to the state in the development of manned space flight) and Order of Friendship (in 2011). Leonov is the last survivor of the five cosmonauts in the Voskhod programme as of March 2016.
The first American to go on a spacewalk was Ed White whose spacewalk lasted for 23 minutes. He was the test pilot of Gemini4 spacecraft. The world record for the most spacewalks is held by Russian astronaut Anatoly Solovyev. He has been on 16 spacewalks and spent more than 82 hours outside in space.