 Well, today, of course, is a federal holiday. That means scheduled changes and closings. Metro Rail will be open from 7 a.m. until midnight and operating on a Sunday schedule. All rail and bus trips will be free after 5 p.m. and parking at Metro lots will be free all day. Trash and recycling will be picked up as usual today in Arlington and Fairfax counties. But those pickups will be delayed one day in several parts of the region, including Alexandria, San Francisco,