Morning Edition

President Obama visited Joplin, Mo., on Sunday as the town begins cleaning up after an F5 tornado killed more than 135 people and counting. The president toured the flattened ruin before attending a memorial in Joplin.

President Obama is expected to nominate a new chairman of the Joint Chiefs of Staff. Army Gen. Martin Dempsey is expected to be the president's pick. If confirmed by the Senate, he would replace Admiral Mike Mullen.

A new study links rising rates of obesity to the increasingly sedentary workplace.

Bicycle-sharing schemes are a fixture in European cities like Copenhagen, but now they are taking root on American soil. In Washington, D.C., over the past eight months, the nation's largest bike-share system has become so popular, it may become a victim of its own success.

When Lady Gaga's Born This Way was released last Monday, online retailer Amazon made a move to boost its sales of the album by offering the whole thing in MP3 form for only 99 cents. So many people bought the album that Amazon's servers had trouble fulfilling all orders. To make it right, Amazon offered the sale price again, on Thursday.