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They were rover missions to Mars.
This question is in the wrong section. (Traditional Viking houses were one room only.)
3 1:fishing 2:traveling 3:war
The first United States spacecraft to land on Mars was Viking 1 on June 19, 1976. It was followed by Viking 2 on September 3, 1976.
viking 1and/or 2
viking 1 and viking 2
Viking 1 and Viking 2 were launched by the US in 1975. Both probes traveled to Mars, took photos of large expanses of the planet's surface from orbit, and released landers. The Viking 1 lander later transmitted the first pictures from the Martian surface. Both landers carried experiments designed to detect living organisms or life processes, but neither of them found any convincing signs of life. The Vikings and their landers were unmanned (robotic) spacecraft.
The Viking 1 and Viking 2 missions consisted of both an orbiter and a lander. The lander landed on the surface of Mars to collect data and images.
Lander
yes
Mariner 9, Mariner5, Viking 1 and Viking 2
yes
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1976.
The viking rovers, vikings I and II.
Viking Lander 1 and Viking Lander 2 Yes, but there are more than that.
The Viking Program, which created Viking 1 and Viking 2 space probes, was invented and launched by the United States.