Alberto Nisman, who accused the Argentine leader of covering up Iran's role in a 1994 terrorist attack, was found shot dead in his apartment on Sunday.
Gregory Asner has loaded a plane with lasers, spectrometers and computers to create models so detailed, they distinguish between and count plant species in even the densest biomes, like the Amazon.
Alberto Nisman was investigating the 1994 bombing of a Jewish community center in Buenos Aires. He was found dead in his apartment on Sunday. David Greene talks to journalist Jonathan Gilbert.
Two days of historic talks in Havana between U.S. and Cuban diplomats ended with both sides expressing the will to continue to talk. Major obstacles still exist in the effort to normalize relations.
Argentina's President Cristina Fernandez says she believes Alberto Nisman, a prosecutor investigating the 1994 bombing of a Jewish center, was murdered.
The most high-level U.S. delegation to visit Cuba in 35 years is in Havana for two days of talks. The meetings follow the historic thaw in relations announced simultaneously last month by President Obama and President Raul Castro. The focus of the talks will be migration and the nuts and bolts of restoring diplomatic ties.
Diplomats are in Cuba this week for talks with high-level representatives from the communist government. The talks, which begin Wednesday, are the first official discussions in decades.
Haiti's President Martelly has formed a new government that he rules by decree. He's appointed some new ministers and a prime minister but hasn't said when new elections will happen. The U.S. has pledged it's backing of Martelly, but many are worried that the continuing political turmoil is hurting reconstruction efforts.
U.S.-Cuba talks start Wednesday to revive a relationship that has been frozen in time. Cuba policy is likely to feature prominently in President's Obama's State of the Union address.