Tens of thousands of protesters turned out on the National Mall Sunday to encourage President Obama to make good on his commitment to act on climate change.
In his Inaugural address from outside the U.S. Capitol, the president said: "We will respond to the threat of climate change knowing that the failure to do so would betray our children and future generations."
Just a few weeks later, next to the Washington Monument, Paul Birkeland was one of a couple dozen people holding a long white tube above their heads.
This week, the Supreme Court will take up a classic David-and-Goliath case. On one side, there's a 75-year-old farmer in Indiana named Vernon Hugh Bowman; on the other, the agribusiness giant Monsanto.
A famous doctor is on trial in Spain, accused of masterminding one of the world's biggest sports doping rings. His clients are believed to include at least one former teammate of disgraced cyclist Lance Armstrong and dozens of other cyclists who raced against him.