berkshire hathaway, in third, chevron, 2nd to exxon mobile. the top of the list the world's biggest retailer, wal-mart $476 billion in revenue. >> that's a half a trillion. some countries aren't that big. that's "nightly business report" for tonight. we want to remind you, this is the time of year your public programs seek your support. >> on behalf of your public them le vision station. thank you so much for your report. we will see you back here tomorrow night. explore new worlds and new ideas through programs like this, made available for everyone through contributions to your pbs station from viewers like you. thank you. [honking and indistinct talking] [cheering] al franken: this is a big favor for us, brent. thanks a lot. thanks a lot. tom davis: we're gonna be going out there in front of all those deadheads, and it's like "jerry! dark star!" we gotta do comedy in front of these guys. brent: yeah, i know. franken: go out there. now, remember, we're friends of the dead for a long time. oh, this is great, tom. this is great. we're going out in front of the dead audience