Now Playing: 05-11-12 Marketplace Morning Report

JPMorgan Chase has made a $2 billion blunder, its CEO Jamie Dimon announced. The loss involves bad bets apparently involving the bank selling insurance contracts against losses on corporate debt. A new study finds that millennials are less likely to be brand loyal. A group of climate activists, including a few teens, is suing the federal government over inaction on climate change. And we look at what it takes -- and costs -- to be a professional ballet dancer.