I've seen several sources this morning detailing that UA, DL, and AA have announced their intentions for the extra perimeter-exempt slot they are receiving at DCA, as follows: AA will fly to LAX using a 757. Unknown at this time as to which route that slot is coming from. DL will add a second daily flight to SLC, flown by 757/737. Slot will be taken off the DCA-LGA route. UA will fly to SFO with a 737. Slot will come from a DCA-ORD route. US is the only incumbent to not yet announce their intentions...who wants to speculate what it will be?