Has President Obama Declared War on Medical Marijuana?

The federal crackdown on medical marijuana has growers, distributors and patients accusing President Obama of breaking a campaign promise. But some law enforcement officers and two Governors think it's time to change the drug's federal classification. Also, challenges for Greece after the debt deal, and the flap over internal documents from the Heartland Institute. Were they obtained by unethical means? What are the consequences for the science of climate change?

Banner image: Medical marijuana advocates demonstrate outside the site where President Barack Obama was holding a fundraiser on February 16, 2012 in San Francisco, California. Photo by Justin Sullivan/Getty Images