Some photos on Twitter ended Anthony Weiner's congressional career. The latest online image was not quite as damaging. Weiner has launched his campaign to be mayor of New York City. A gorgeous city skyline showed up on his homepage. But it wasn't of New York. It was Pittsburgh's skyline.

Fracking is a way of bringing up natural gas by pumping water and chemicals into the ground. Germany's powerful beer industry is worried that fracking would pollute groundwater.

There is some political willingness, but because China is highly decentralized politically, the Communist Party has only limited influence over provincial governments and how they regulate their dirty factories. The powerful state-owned oil companies have also resisted pressure to produce cleaner-burning fuel.

The Iranian presidential election is just weeks away, and voters are faced with a very narrow range of pro-regime candidates to choose from. All the high-profile or independent candidates have been eliminated by the Guardian Council. One man considered unfit to run has already held the post of president.

The collapse sent people and vehicles into the water Thursday night. Authorities say there were no fatalities. The bridge, about an hour north of Seattle, lost its northernmost span ? taking out all lanes in both directions.