DCA had very dense fog this morning, causing at least some delays. I passed by the airport around 0720, and it was getting close to zero visibility.
Before I got on the parkway I saw a 737, airline unknown, climbing out to the northwest. I saw a prop job shortly afterward, but I think those must have been the last ones to depart until after 0900.
Anyone know how many flights were delayed, and how many made it out after 0720? Does DCA have the same equipment as ORD and other airports, that allow landings and takeoffs in very low visibility?