As the skies become more crowded, technology could be used to enable the size of such "safety spheres" to be reduced - or rather, to allow planes to fly closer to each other.
The Saudis approved Pentagon use of the Combined Air Operations Center (CAOC), a multibillion-dollar U.S.-built facility at the Prince Sultan base, to direct the air war against the Taliban but did not offer to allow American bombers to fly combat missions from Saudi bases.
She and her sister gradually accumulated enough seniority to allow them to fly around the world on their airline passes, and they found that single-women tourists were about as rare as female businesswomen on airplanes.
Fargo said it was also important to allow players to just fly around in these levels.
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The move to allow some aircraft to fly again was agreed at a meeting of the oil and gas industry's Helicopter Safety Steering Group in Aberdeen on Thursday.
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Tom Williams faked injury to allow fly-half Nick Evans to return to the field in a cup tie and director or rugby Dean Richards has since stood down.
The now notorious incident occurred during the Heineken Cup tie against Leinster in April when wing Tom Williams faked injury to allow fly-half Nick Evans to return to the field.
The "trim tab, " which enables the pilot to manually manipulate controls such as the rudder, would allow the crew to fly the aircraft safely.
Brian Doherty of DSD said the professor had a heart condition that did not allow him to fly.
The trend toward smaller jets is quietly occurring over the Atlantic, too, as new advances now allow airlines to fly over the ocean with two engines instead of three or four, which makes flying smaller aircraft on the routes more feasible.
New technology that would allow more planes to fly but put air-traffic controllers out of work is blocked by unions.
The merits of these are that they allow any airline to fly where and when it wants between two countries, with no limits on capacity or need for official approval of fares.
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By all accounts, the agreement would allow the U.S. to fly cruise missiles, fighter jets or unmanned armed drones against targets in Yemen with the consent of that government.
Among BAE Systems' plans, for example, is the co-operative control of drones, which would allow a pilot in a jet to fly with a squadron of the robot aircraft on surveillance or combat missions.
The search giant revealed it is working on technology that it will allow it to translate images of text, on the fly, into another language.
Grouping the nation's patients and livers into fewer, larger regions might allow broader allocation without the risks of having to fly organs across the country (even with the best care, livers can last only half a day on ice).
The UK government has said it will not allow him safe passage out of the country to fly to Ecuador, while the Swedish foreign ministry insisted the sole reason they want Mr Assange extradited is so the allegations against him can be properly investigated.
Pilots are required to fly under the direction of air traffic controllers but federal regulations allow for some deviation in emergency situations.
Proponents of a no-fly zone say that it would not just protect civilians but also allow a new government to flourish.
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