Successes and failures on way to planet
Getting a spacecraft to orbit Mars is a complex mission that few countries have attempted and even fewer have achieved.
The Soviet Union made the world's first attempt in 1960, but the satellite didn't get far from Earth. The United States had the first successful mission four years later, when a flyby satellite, Mariner 4, beamed 21 images of the red planet's surface back to Earth.
Since then, more than half of the 41 attempts have failed for myriad reasons, including rocket malfunction, radio failure, fuel troubles and missed landings.
Here is a breakdown of successful and failed attempts:
US: 15 successful attempts, 4 failures
Soviet Union: 2 successful attempts, 14 failures
Russia: 2 failures
European Space Agency: 1 success
Japan: 1 failure
India: 1 success
Source: NASA
AP
(China Daily 09/25/2014 page11)