Viking 40th Anniversary Emblem
![Viking 40th Anniversary Emblem Viking 40th Anniversary Emblem](https://nasa3d.arc.nasa.gov/shared_assets/models/viking-40emblem/Viking-medallion-3_428x321.jpg)
NASA's Viking Project found a place in history when it became the first U.S. mission to land a spacecraft successfully on the surface of Mars. Two identical spacecraft, each consisting of a lander and an orbiter, were built. Each orbiter-lander pair flew together and entered Mars orbit; the landers then separated and descended to the planet's surface.