+ NASA Homepage + NASA en Español + Marte en Español + Mars Home + MER Home How to Land Softly on a Hard Planet Extensive testing of airbags is necessary before engineers arrive at a final design. Larger Image (120 kB) Return to Text + Freedom of Information Act + The President's Management Agenda + FY 2002 Agency Performance and    accountability report + NASA Privacy Statement, Disclaimer, and    Accessiblity Certification + Freedom to Manage Last Updated: + Comments and Questions