"These flights will be an important part of our efforts to ensure the safety of passengers and return these aircraft to service, " the agency said.

CNN: Boeing can conduct Dreamliner test flights

In Russia, there is an ongoing problem with aircraft left over from the Soviet era, though the government has recognised the issue and says it is redoubling its efforts to ensure the safety of passengers going forward.

BBC: A record year in airline safety

Mayor ANTONIO VILLARAIGOSA (Los Angeles): I will be on that subway and that light rail line today to encourage people to remain calm and to demonstrate my confidence that this system is safe and that we are doing everything possible to ensure the safety of our passengers.

NPR: New York, Los Angeles Step Up Security

"To ensure the safety of those on board, he was restrained by passengers and crew and was monitored for his own safety for the duration of the flight, " he added.

CNN: STORY HIGHLIGHTS