Alberto Nisman, the prosecutor investigating the 1994 bombing of the Argentine-Israeli Mutual Association community center, talks to journalists in Buenos Aires, Argentina, in 2013. Nisman was found shot dead in his apartment on Sunday. Natacha Pisarenko/AP hide caption

itoggle caption Natacha Pisarenko/AP

World leaders, including, from the left, Israel's Prime Minister Benjamin Netanyahu, Mali's Ibrahim Boubacar Keita, France's Francois Hollande, Germany's Angela Merkel, EU President Donald Tusk and Palestinian President Mahmoud Abbas march in Paris on Sunday to honor the victims of three days of bloodshed. A White House spokesman acknowledged "we should have sent someone with a higher profile." Philippe Wojazer/AP hide caption

itoggle caption Philippe Wojazer/AP

Abu Hamza al-Masri, also known as Mustafa Kamel Mustafa, at a 2002 fundamentalist Islamic conference in London, where he condemned what he called oppression of Muslims in the West. Masri was sentenced Friday in U.S. court to life in prison on terrorism-related charges. Alistair Fuller/AP hide caption

itoggle caption Alistair Fuller/AP

A United Airlines 747-400 taxis at San Francisco International Airport in 2011. A group of flight attendants have filed suit against the airline to contest their firing over their handling of a perceived safety threat. Eric Risberg/AP hide caption

itoggle caption Eric Risberg/AP

Cooperative captives conduct afternoon prayers inside a communal cellblock at Camp 6 last month at the U.S. Navy base at Guantanamo Bay, Cuba. Six long-time detainees of the prison have been transferred to Uruguay. Walter Michot/MCT/Landov hide caption

itoggle caption Walter Michot/MCT/Landov

Adnan Shukrijumah is shown in these undated images provided by the FBI. The suspected al-Qaida operative who lived for more than 15 years in the U.S., was reportedly killed in a raid by the Pakistani military. Anonymous/AP hide caption

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Erol Incedal, seen in this court artist's sketch, appears at the Old Bailey in London. The court found him guilty last week of possessing a bomb-making document. Elizabeth Cook/PA Photos/Landov hide caption

itoggle caption Elizabeth Cook/PA Photos/Landov

New South Wales Police Commissioner Andrew Scipione (right) and Australian Federal Police Acting Commissioner Andrew Colvin describe how 800 federal and state police officers raided more than two-dozen properties as part of the operation Thursday in Sydney. Rick Rycroft/AP hide caption

itoggle caption Rick Rycroft/AP