It has been a busy year in Mexico's war on drugs. The administration of former President Felipe Calderon struck major blows to the country's largest cartels, slowing the violence that has claimed more than 50,000 lives.
But the new president, Enrique Pena Nieto, says he'll change tactics. He wants to go after the crime associated with drug trafficking instead of taking down crime bosses. His new attorney general says this is the right strategy, since the number of crime gangs working in the country has grown significantly.
The past year has seen more debate about the best way to find breast cancers.
A recent analysis concluded that regular mammograms haven't reduced the rate of advanced breast cancers — but they have led more than a million women to be diagnosed with tumors that didn't need to be treated.
Every year, banks handle tens of millions of transactions. Some of them involve drug money, or deals with companies doing secret business with countries like Iran and Syria, in defiance of trade sanctions.
But if the Justice Department has its way, banks will be forced to change — to spot illegal transactions and blow the whistle before any money changes hands.
Federal prosecutors have already collected more than $4.5 billion from some of the world's biggest financial institutions — banks charged with looking the other way when dirty money passed through their accounts.