NORAD is planning an exercise this week in the Washington region to enhance its skills and test a warning system.
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NORAD plans exercise in Washington region
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Relief events planned for this weekend
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Portland tests new Emergency communications system
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Terrorist attacks in Afghanistan get bolder
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Army training coming in handy:
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Government to conduct first nationwide test of emergency alert system
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Army to continue with live fire exercises
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US announces new security measures
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Defence boosts security at bases
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Ontario could soon have an alert system to locate wandering seniors
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Police departments perform counter-terrorism exercise
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Agencies step up counterterrorism measures
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White Island's aviation alert level raised
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Coast Guard conducts training exercise on Potomac River
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M'sia, Thailand join exercises
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Avalanche training exercise a success
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Additional security personnel deployed in Koraput