Surprising news:
A judge on Friday ordered the arrest of Mexico's former President Luis Echeverria for a 1968 student massacre in a surprise move just two days before a presidential election.
The judge ruled that there was enough evidence to support the charge of genocide brought against Echeverria, 84, by special prosecutor Ignacio Carrillo.
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Warren Buffett, the world's second-richest person, is donating about $37 billion - more than 80 percent of his fortune - to foundations run by his friend Bill Gates and by the Buffett family.
The announcement by the 75-year-old Buffett comes just days after Microsoft Chairman Gates said he would move away from his day-to-day role at the software giant to focus more on charity work, and highlights the close friendship of the world's two richest men.