mr. obama cheryl hurd is on our presidential detail. she joins us from the walmart where he will be speaking on thursday. >> reporter: it is no coincidence that people are running around sprucing up this walmart store. it's not every day the president drops by your store. for some, this visit is a little surprising. on friday, president obama will come to this walmart store in mountain view to talk about the importance of energy efficiency. uc berkley's director is of a little surprised. >> they haven't been the stellar company on many issues. however, if they were to act. if they were to raise wages. if they were to

mr. obama cheryl hurd is on our presidential detail. she joins us from the walmart where he will be speaking on thursday. >> reporter: it is no coincidence that people are running around sprucing up this walmart store. it's not every day the president drops by your store. for some, this visit is a little surprising. on friday, president obama will come to this walmart store in mountain view to talk about the importance of energy efficiency. uc berkley's director is of a little surprised. >> they haven't been the stellar company on many issues. however, if they were to act. if they were to raise wages. if they were to really step up on climate change they could have an enormous influence on the economy. >> reporter: the retail giant imemploys 1.3 americans. on the record, walmart has been trying to let its customers know the company is working on saving energy. meanwhile, the president has been to silicon valley many times before to rub shoulders with tech company ceos but never to a big box store. on friday he will be shaking hands with