Reason Morning Links: Obama Changes Nuke Strategy, Karzai Threatens to Join Taliban, Mine Blast in West Virginia

• Mining explosion in West Virginia kills at least 25.
• Obama narrows the number of scenarios under which the U.S. would use nuclear weapons.
• Afghan President Hamid Karzai threatens to join the Taliban.
• North Koreans: not brainwashed, just miserable.
• Lesbian Mississippi student tricked into attending fake prom.
• Seeing images of sick people may boost your immune system.