Opportunity Pancam: Burns Cliff in Endurance Crater on the Meridiani Planum of Mars,
named for late mineralogist and geochemist Roger Burns, proved to be too steep
for Opportunity to climb.  Before going back across the slope to egress the crater
via a safer route, the science team wanted a multispectral record of the Burns Cliff
stratigraphy to continue to "read" its geologic story.