A wave of bold political assassinations in Mexico is putting new pressure on the country’s fight against drug cartels. The back-to-back killings show how dangerous it remains to oppose organized crime. Also, the US State Department shuts down a website that made it possible for the public to report potential human rights abuses committed by foreign entities using American-made weapons. And, the UK proposes a new bill that would make paid leave for IVF and other fertility treatments a legal right. Plus, a new play, “Kyoto,” looking at the 1997 UN agreement on greenhouse gas emissions, debuts in New York City. Listen to today’s Music Heard on Air.