11.   ...an overburdened air traffic control system.

12.   Extended the trade embargo against Iraq to cover interdiction of air traffic and took other steps to tighten the embargo.

13.   Although air traffic to Libya was halted, land routes, especially through Egypt, remained open.

14.   The only way to stabilise them is to limit the growth in air traffic.

15.   But Ulster Unionist councillor Jim Rodgers strongly opposes the plan, saying the increase in road and air traffic will make local people suffer.

16.   Also, he said the terrorist attacks show the need to develop a regional approach to handing air traffic in California.

17.   Also, the presidents signed an open skies agreement that will permit unrestricted international air traffic between the countries.

18.   Ambulances from throughout the region converged on the scene and airspace over the region was sealed off to all but police and hospital air traffic.

19.   Although passenger and commercial air traffic has gradually resumed, some international flights stayed grounded.

20.   An explosion in commercial air traffic may be triggering formation of high-altitude clouds that trap heat and could worsen global warming.