Traditionally, Reagan National (DCA) operations had to fall within a 1,250 mile radius. A few years ago, they decided to allow ops beyond this radius classifying them as “beyond-perimeter,” which subsequently meant that the normal ops were “within-perimeter.” I recall TWA was granted some of the original “beyond-perimter” slots allowing them to operate DCA-LAX non-stop. They got swallowed up by AA shortly thereafter, so I don’t think those ever got started. Interesting that none of the bigboys applied for the LAX-DCA slot and that Alaska, who doesn’t have a really big LAX operation, did.