Mars 2020 lander's heat shield cracks in testing
 

One of Mars 2020's heat shields cracked after a week-long series of tests, and NASA has no choice but to ask Lockheed Martin to build a replacement. The heat shield's purpose is to envelope and protect the Mars 2020 rover and landing system so they d...

https://www.engadget.com/2018/04/28/...-shield-crack/