In the summer of 2003, two NASA rovers began their journeys to Mars at a time when the Red Planet and Earth were the nearest they had been to each other in thousands of years.

To capitalise on this alignment, the rovers had been built at breakneck speed by teams at NASA’s Jet Propulsion Laboratory.

The mission came amid further pressures, from mounting international competition to increasing public scrutiny following the loss of the space shuttle Columbia and its crew of seven.

NASA was in great need of a success.

This is the story of Opportunity and Spirit surviving a massive solar flare during cruise, now known as the “six minutes of terror,” and what came close to being a mission-ending software error for the first rover once it was on the ground.