Israel closed its air space to foreign planes, closed land crossings and evacuated staff from diplomatic missions and Jewish institutions around the world.
Keep the windows closed and the air-conditioning on, giving you an allergen free bubble.
Officials and manufacturers also claim that new scrubbing technologies mean modern incinerators emit far fewer noxious nasties than their older counterparts, many of which have been closed down as air-quality rules have been tightened.
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Once inside, keep your windows closed, change your air filters, and run your air conditioner, Dr. Kao adds.
There is plenty of pain involved in this, of course, for people who thought they had a career in the forces but are now being asked to leave, air bases closed, or famous regiments disbanded.
"By that I mean try to imagine creating a cavity inside your mouth without any air bubbles and by letting in no air through your lips or throat -- it's basically impossible at sea level because the air pressure outside your mouth pushes the air pocket closed, " he said.
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Correspondents say the Obama administration is hoping that President Zardari will agree to reopen key Nato supply routes through Pakistan into Afghanistan, which were closed in November after US air strikes killed Pakistani troops.
International flights are subject to severe disruption, and US air space is still closed to civilian flights.
The company said that a deal for Spanair had already been signed while one for Air Baltic was signed and closed.
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The fact that the port is closed means all supplies must arrive by air, said Patrick McCormick, emergency communications officer for the non-governmental organization.
On Sunday, the junta closed all Guinea-Bissau's air and sea borders after Portugal announced it was sending two navy ships and a military plane for a possible evacuation of its nationals.
Prospect Park, which bought "All My Children" and "One Life to Live" after ABC yanked the aging sudsers, announced today that it has closed deals with the Hollywood unions to air the soaps on The Online Network.
Energy operators also must meet with homeowners and others who live within 1, 000 feet of their proposed projects to listen to their concerns, not use open pits to store drilling waste and ensure their venting system is closed to prevent sending methane into the air.
In addition to the 168 towers to be closed April 1, some 16 towers that are operated on a cost-sharing basis with other governments, and five operated with the Air National Guard, will be closed Sept. 30.
When the polls have closed, and the ads are finally off the air, it comes down to you -- the American people and your lives, and your children's futures.
The Port Authority instead wants the FAA to adopt some of its own proposals, which range from permanently reopening closed military airspace to civilian use to investing in new air-traffic-control technology.
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In the past four years, it has reduced the size of its administrative staff by about 20%, to about 830 people, and closed some regional offices while reducing spending on conferences and air travel.
Travel problems have eased after many roads were closed on Friday and Saturday, while rail, ferry and air travel was also disrupted.
Meanwhile, Heathrow Airport has been closed to all incoming flights that are not already in the air, while several outbound services have been cancelled.
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Another designer has ideas to create "smart wings" with materials that change shape or have holes that can be open and closed to create the kind of airflow needed to maintain or reduce air speed.
Additionally, air-traffic control towers at 149 smaller airports nationwide are slated to be closed starting April 7.
The rooms are designed like upgraded 1950s bomb shelters, with air filters to screen out biological agents, dedicated phone lines, bathrooms and closed-circuit TV systems.
The city's international airport was also closed to flights at one point, and staff began building a temporary control tower, as air traffic facilities were switched to emergency power sources.
Last week, the Interior Ministry closed the Imsaed border crossing with Egypt to any foreigners, officially to discourage illegal immigration, and began air patrols over the border out of Tobruk.
In response, Pakistan has closed its border with Afghanistan to critical coalition supply convoys and ordered the U.S. to vacate an air base used for drone attacks.
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