Le Warner News Today

>> warner: on the "daily download" tonight, we look at how mitt romneys trip to london is being tracked in social media. >> woodruff: from illinois, we have the story of scientists trying to tamp down the population of an invasive fish. at the same time, they search for ways to profit from them. >> one of the problems with getting people interested in eating asian carp is they happen to have a lot of bones in some strange places so theyre really hard to filet. >> warner: and we examine...