Glenn Greenwald, left, and David Miranda after Miranda's arrival at Rio de Janeiro's International Airport on Aug. 19, 2013. Miranda had been detained for nine hours at London's Heathrow Airport. Authorities questioned him about Greenwald's reporting of the "NSA leaks." Ricardo Moraes /Reuters/Landov hide caption

itoggle caption Ricardo Moraes /Reuters/Landov

Glenn Greenwald (left) and David Miranda after Miranda's arrival early Monday at Rio de Janeiro's International Airport. Miranda had been detained for 9 hours at London's Heathrow Airport. Authorities reportedly questioned him about Greenwald's reporting of the "NSA leaks." Ricardo Moraes /Reuters/Landov hide caption

itoggle caption Ricardo Moraes /Reuters/Landov