[rxsid]

"WASHINGTON – You might be excused for thinking a US carrier strike force is nearing the Korean peninsula, days or even hours away from taking up station in response to heightened tensions in the region. For more than a week, media reports in the U.S. and around Asia routinely mention the approach of the USS Carl Vinson carrier strike group, seemingly implying some sort of attack on North Korea could be imminent.

...

While declining to confirm a specific date, they did not dispute speculative media reports from South Korea that the strike group could be in the region by April 25 or so.

Speculation has been rising that the Ronald Reagan and Nimitz strike groups could join with the Vinson. The Japan-based carrier Reagan, however, is in a maintenance period at Yokosuka scheduled to complete in May, and would need at least a minimal amount time to work up its crew and air wing to regain operational proficiency.

The Bremerton, Washington-based Nimitz and her strike group is off Southern California, nearing the completion of its major pre-deployment exercise. The ship is scheduled to deploy this spring to relieve the Vinson in the Western Pacific. The carrier, if need be, could be sent early, but Navy and Pentagon officials said Friday and Monday no such move is planned."
http://www.defensenews.com/articles/us-carrier-still-thousands-of-miles-from-korea

[Mariner]

There are PLENTY of USAF assets in theater.

Plenty.