| NASA's Mars Polar Lander launched, mission later fails after communication lost trying to land on Mars (Dec 3 1999) NASA’s Mars Polar Lander launched, mission later fails after communication lost trying to land on Mars (Dec 3 1999) |
| NASA's Mars Polar Lander launched, mission later fails after communication lost trying to land on Mars (Dec 3 1999) NASA’s Mars Polar Lander launched, mission later fails after communication lost trying to land on Mars (Dec 3 1999) |
