Although the US rover program has made Mars look easy, it's been fiendishly failure prone for other space agencys Outside of one Russian lander working for 120

Although the US rover program has made Mars look easy, it's been fiendishly failure prone for other space agencys Outside of one Russian lander working for 120 seconds after touchdown before failing, no nation outside the US has ever gotten a lander to work on Mars before. Have a look at the list of mars missions and see just how many failures there are: https://en.wikipedia.org/wiki/List_of_missions_to_Mars https://en.wikipedia.org/wiki/List_of_missions_to_Mars