link | 2004, mars, opportunity, rovers, sand, transport | Tue Sep 5 21:48:20 EDT 2017 link | 2012, jpl, mars, nasa, opportunity | Fri Sep 7 01:57:35 GMT 2012 link | 2012, jpl, mars, nasa, opportunity | Fri Sep 7 01:52:31 GMT 2012 link | 2012, jpl, mars, nasa, opportunity | Tue Aug 21 19:26:19 CDT 2012 link | 2012, mars, opportunity | Thu Mar 22 21:02:21 GMT 2012 link | 2012, mars, opportunity | Thu Mar 22 21:01:31 GMT 2012 link | 2012, mars, opportunity | Thu Mar 22 20:59:31 GMT 2012 link | mars, nasa, opportunity | 2010-07-31 22:55:42