Petrobras: The Brazilian government control 60 percent of the Rio de Janeiro-based Petrobras Oil Company and has a final say in its investment decisions.

CENTERFORSECURITYPOLICY: A non-violent tool for countering the Iranian threat

Michael Harris was a geologist in Rio de Janeiro for Devon Energy, a U.S.-based natural gas and oil producer, according to a company spokesman.

CNN: Former royal, Riverdance star among plane's missing