NASA’s Perseverance rover nails 21-ft test drive, gets software update for Mars exploration

Mission controllers also completed a software update replacing the rover's landing program, with one they will rely on to study the planet.

from http://www.firstpost.com/tech/science/nasas-perseverance-rover-hits-dusty-red-road-makes-its-first-21-feet-journey-on-mars-9390241.html