F.A.A. says ongoing conflict poses "serious potential threat."
Shooting of black teen by police sparked two nights of violence.
A senior U.S. health official said the outbreak was out of control but insisted it could be stopped.
Suit alleges he exceeded his powers when he delayed an insurance deadline in his healthcare law.
Governor says federal government has "failed to secure" border.
Agencies snooped in effort to identify security threats, documents indicate.
Officials fear Islamists are developing bombs to be smuggled onto planes.
Said he will use his own powers to direct resources to Mexican border.
Tensions have eased in Ferguson, Missouri, after days of unrest.
Police in Ferguson, Missouri, claim to come under "heavy fire," arrest 31.
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